US3700433A - Enhancement of transverse properties of directionally solidified superalloys - Google Patents
Enhancement of transverse properties of directionally solidified superalloys Download PDFInfo
- Publication number
- US3700433A US3700433A US161912A US3700433DA US3700433A US 3700433 A US3700433 A US 3700433A US 161912 A US161912 A US 161912A US 3700433D A US3700433D A US 3700433DA US 3700433 A US3700433 A US 3700433A
- Authority
- US
- United States
- Prior art keywords
- percent
- transverse
- columnar
- zirconium
- properties
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000601 superalloy Inorganic materials 0.000 title abstract description 13
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 17
- 229910052726 zirconium Inorganic materials 0.000 description 17
- 229910045601 alloy Inorganic materials 0.000 description 11
- 239000000956 alloy Substances 0.000 description 11
- 238000005266 casting Methods 0.000 description 11
- 230000035882 stress Effects 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- NRUQNUIWEUZVLI-UHFFFAOYSA-O diethanolammonium nitrate Chemical compound [O-][N+]([O-])=O.OCC[NH2+]CCO NRUQNUIWEUZVLI-UHFFFAOYSA-O 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
- C30B29/605—Products containing multiple oriented crystallites, e.g. columnar crystallites
Definitions
- the present invention relates in general to the nickelbase superalloys particularly as unidirectionally solidified into columnar-grained castings.
- the mechanical properties of the columnar grain casting including both strength and ductility, parallel to the columnar grains are superior to those obtainable by conventional casting.
- the mechanical properties in the transverse direction are not as high as those in the longitudinal direction.
- a particularly desirable alloy for turbine blade applications is that referred to in the VerSnyder patent as SM- 200 (now known as MAR-M200), having a nominal chemical composition of, by weight, 9 percent chromium, 10 percent cobalt, 12.5 percent tungsten, 1 percent columbium, percent aluminum, 2 percent titanium, 1.5 percent iron, 0.015 percent boron, 0.05 percent zirconium, 0.15 percent carbon, balance essentially nickel.
- SM- 200 now known as MAR-M200
- MAR-M200 having a nominal chemical composition of, by weight, 9 percent chromium, 10 percent cobalt, 12.5 percent tungsten, 1 percent columbium, percent aluminum, 2 percent titanium, 1.5 percent iron, 0.015 percent boron, 0.05 percent zirconium, 0.15 percent carbon, balance essentially nickel.
- the present invention contemplates the inclusion of about 1 percent zirconium in nickel-base superalloy castings characterized by a columnar grained microstructure. It is known in the art that the hot workability of alloys may sometimes be improved by the addition of zirconium, cerium, hafnium or yttrium, as indicated in an article entitled A New Approach to the Problem of the Workability of Nickel- Chromium Alloys, Parry et al., Journal of the Institute of Metals (1969), vol. 97.
- the present invention contemplates the inclusion of about 1 weight percent zirconium to the nickel-base superalloy castings characterized by a columnar grained microstructure resultant from controlled unidirectional solidification techniques, to provide improved mechanical properties transverse to the direction of columnar grain alignment.
- a maximum zirconium content of about 1.25 weight percent is required with the advantageous results being obtained within the zirconium content range of about 0.75-1.25 percent.
- the nickel-base superalloys are recognized as those having high strengths at high temperatures such as those associated with the hot section of gas turbine engines. It is from this class of alloys that blades and vanes for use in gas turbine engines are preferably formed. As a class, these alloys are usually characterized by the inclusion of aluminum and/or titanium to promote the formation of the Ni (Ti,Al) intermetallic (7' phase), strengthening a nickel-chromium solid solution matrix. These alloys also normally contain elements like cobalt, and the refractory metals such as tungsten, molybdenum, etc. Typical of such superalloys are those referred to in the VerSnyder patent.
- the addiiton of zirconium to the directionally solidified alloy casting will significantly improve its properties in a direction transverse to the growth direction. Illustrative of this effect is the enhancement of transverse properties to the MAR-M200 alloy resultant from the addition of 1 percent zirconium as shown in Table I. At 1400" F. (ductility minimum in this alloy) the increase in creep is most striking while at 1800 F. the creep elongation is enhanced. The significant increase in 1400 F. properties is most desirable in gas turbine hardware. It will also be noted that at a zirconium content of 1.3 weight percent, the transverse properties are inferior even to the basic MAR-M200 composition which for the purposes of the TABLE I Weight percent Zirconium (PWA 664) 0.8 1.15 1.3
- the transverse properties of the directionally-solidified columnar-grained castings have been brought to strength levels in the transverse plane approaching the strengths in the longitudinal direction, thereby reducing the extent of anisotropy in ductility and strength therein. Furthermore, consonant with the transverse property improvement, the desirable longitudinal proper-ties of the columnar-grained material (enhanced thermal fatigue resistance, enhanced longitudinal creep properties and decreased longitudinal modulus) are still retained.
- weight percent zirconium characterized by a columnar grained microstructure with the columnar grains substantially aligned parallel to the principal stress axis of the article and characterized further by strength and creep properties transverse to said stress axis approaching those parallel thereto.
- a cast article comprising:
- a superalloy which consists essentially of, by weight, about 9 percent chromium, 10 percent cobalt, 12.5 percent tungsten, 1 percent columbium, 2 percent titanium, 5 percent aluminum, 1 percent zirconium, up to about 0.20 percent carbon, 0.02 percent boron, balance substantially nickel, characterized by a columnar grained microstructure with the columnar grains substantially aligned parallel to the principal stress axis of the article and characterized further by strength and creep properties transverse to said stress axis approaching those parallel thereto.
- the cast article is a gas contacting blade.
Abstract
THE MECHANICAL PROPERTIES OF THE COLUMNAR-GRAINED, NICKEL-BASE SUPERALLOYS IN THE TRANSVERSE DIRECTION ARE SIGNIFICANTLY IMPROVED BY THE ADDITION THERETO OF ABOUT 1 PERCENT ZICONIUM.
Description
United States Patent 3,700,433 ENHANCEMENT 0F TRANSVERSE PROPERTIES OF DIRECTIONALLY SOLIDIFIED SUPERALLOYS David N. Duhl, Newington, Couu., assignor to United Aircraft Corporation, East Hartford, Conn. No Drawing. Filed July 12, 1971, Ser. No. 161,912 Int. Cl. C22c 19/00 US. Cl. 148-325 4 Claims ABSTRACT OF THE DISCLOSURE The mechanical properties of the columnar-grained, nickel-base superalloys in the transverse direction are significantly improved by the addition thereto of about 1 percent zirconium.
BACKGROUND OF THE INVENTION The present invention relates in general to the nickelbase superalloys particularly as unidirectionally solidified into columnar-grained castings.
In the patent to VerSnyder 3,260,505, of common assignee with the present invention, reference is made to the production of castings, such as turbine blades, by unidirectional solidification techniques. Castings so pro duced have an elongated, columnar macro-grain structure with substantially unidirectional crystals aligned therein; that is, with a columnar structure in the castings. As a turbine blade, the grain boundaries are oriented to be substantially parallel to the principal stress axis of the blades, and there is an almost complete elimination of grain boundaries normal to this stress axis.
The mechanical properties of the columnar grain casting, including both strength and ductility, parallel to the columnar grains are superior to those obtainable by conventional casting. The mechanical properties in the transverse direction, however, viz perpendicular to the columnar grains, are not as high as those in the longitudinal direction. With current developments in cooled turbine hardware and the related thermal stresses incident thereto strength improvements in the transverse properties of directionally-solidified castings are very desirable.
A particularly desirable alloy for turbine blade applications is that referred to in the VerSnyder patent as SM- 200 (now known as MAR-M200), having a nominal chemical composition of, by weight, 9 percent chromium, 10 percent cobalt, 12.5 percent tungsten, 1 percent columbium, percent aluminum, 2 percent titanium, 1.5 percent iron, 0.015 percent boron, 0.05 percent zirconium, 0.15 percent carbon, balance essentially nickel. In the patent to Gell et al. 3,567,526, the substantial elimination of carbon is recommended.
As hereinafter discussed in greater detail, the present invention contemplates the inclusion of about 1 percent zirconium in nickel-base superalloy castings characterized by a columnar grained microstructure. It is known in the art that the hot workability of alloys may sometimes be improved by the addition of zirconium, cerium, hafnium or yttrium, as indicated in an article entitled A New Approach to the Problem of the Workability of Nickel- Chromium Alloys, Parry et al., Journal of the Institute of Metals (1969), vol. 97. Furthermore, certain prior art compositions, such as those referred to in the patent to Freche et al., 3,276,866, frequently describe zirconium contents of up to two percent when referring to alloys "ice having sufiicient ductility to facilitate fabrication of the alloy into sheet. In describing the alloy, designated WAZ- 20, the above inventors in the report NASA TN D-5352 available from the Clearinghouse for Federal Scientific and Technical Information observe that zirconium and trace amounts of other elements were picked up from the crucible during induction melting.
SUMMARY OF THE INVENTION The present invention contemplates the inclusion of about 1 weight percent zirconium to the nickel-base superalloy castings characterized by a columnar grained microstructure resultant from controlled unidirectional solidification techniques, to provide improved mechanical properties transverse to the direction of columnar grain alignment.
A maximum zirconium content of about 1.25 weight percent is required with the advantageous results being obtained within the zirconium content range of about 0.75-1.25 percent.
DESCRIPTION OF THE PREFERRED EMBODIMENTS The nickel-base superalloys are recognized as those having high strengths at high temperatures such as those associated with the hot section of gas turbine engines. It is from this class of alloys that blades and vanes for use in gas turbine engines are preferably formed. As a class, these alloys are usually characterized by the inclusion of aluminum and/or titanium to promote the formation of the Ni (Ti,Al) intermetallic (7' phase), strengthening a nickel-chromium solid solution matrix. These alloys also normally contain elements like cobalt, and the refractory metals such as tungsten, molybdenum, etc. Typical of such superalloys are those referred to in the VerSnyder patent.
The addiiton of zirconium to the directionally solidified alloy casting will significantly improve its properties in a direction transverse to the growth direction. Illustrative of this effect is the enhancement of transverse properties to the MAR-M200 alloy resultant from the addition of 1 percent zirconium as shown in Table I. At 1400" F. (ductility minimum in this alloy) the increase in creep is most striking while at 1800 F. the creep elongation is enhanced. The significant increase in 1400 F. properties is most desirable in gas turbine hardware. It will also be noted that at a zirconium content of 1.3 weight percent, the transverse properties are inferior even to the basic MAR-M200 composition which for the purposes of the TABLE I Weight percent Zirconium (PWA 664) 0.8 1.15 1.3
Test F/K s.i. Life Percent E Life Percent E Life Percent E Lite Percent E A. Transverse:
1,400/100 i 1 2.8 224.5 5. 7 B.O.L. 1,800/25. 49 1. 3 2. 3 1,800] 40 1.3 5. 1 B. Longitudinal:
l B.O.L.=broke on loading.
With the zirconium addition, the transverse properties of the directionally-solidified columnar-grained castings have been brought to strength levels in the transverse plane approaching the strengths in the longitudinal direction, thereby reducing the extent of anisotropy in ductility and strength therein. Furthermore, consonant with the transverse property improvement, the desirable longitudinal proper-ties of the columnar-grained material (enhanced thermal fatigue resistance, enhanced longitudinal creep properties and decreased longitudinal modulus) are still retained.
The invention in its broader aspects is not limited to the specific steps, process and compositions shown and described but departures may be made therefrom within the scope of the appended claims without departure from the principles of the invention and without sacrificing its chief advantages.
What is claimed is:
1. In the production of a columnar-grained cast article by the unidirectional solidification of a nickel-base superalloy, the method of improving the mechanical properties transverse to the alignment of the columnar grains which comprises incorporating 0.75-1.25 weight percent zirconium in the superalloy composition.
2. As an article of manufacture, a cast article comprisa nickel-base superalloy containing about 0.75-1.25
weight percent zirconium characterized by a columnar grained microstructure with the columnar grains substantially aligned parallel to the principal stress axis of the article and characterized further by strength and creep properties transverse to said stress axis approaching those parallel thereto.
3. As an article of manufacture, a cast article comprising:
a superalloy which consists essentially of, by weight, about 9 percent chromium, 10 percent cobalt, 12.5 percent tungsten, 1 percent columbium, 2 percent titanium, 5 percent aluminum, 1 percent zirconium, up to about 0.20 percent carbon, 0.02 percent boron, balance substantially nickel, characterized by a columnar grained microstructure with the columnar grains substantially aligned parallel to the principal stress axis of the article and characterized further by strength and creep properties transverse to said stress axis approaching those parallel thereto.
4. A cast article according to claim 3 wherein:
the cast article is a gas contacting blade.
References Cited UNITED STATES PATENTS 3,260,505 7/1966 VerSnyder -171 RICHARD O. DEAN, Primary Examiner US. Cl. X.R.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16191271A | 1971-07-12 | 1971-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3700433A true US3700433A (en) | 1972-10-24 |
Family
ID=22583328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US161912A Expired - Lifetime US3700433A (en) | 1971-07-12 | 1971-07-12 | Enhancement of transverse properties of directionally solidified superalloys |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3700433A (en) |
| AU (1) | AU461071B2 (en) |
| CA (1) | CA958252A (en) |
| CH (1) | CH552678A (en) |
| DE (1) | DE2223455A1 (en) |
| FR (1) | FR2145916A5 (en) |
| GB (1) | GB1359938A (en) |
| IL (1) | IL39127A (en) |
| IT (1) | IT962731B (en) |
| NL (1) | NL7206795A (en) |
| SE (1) | SE377136B (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4915907A (en) * | 1986-04-03 | 1990-04-10 | United Technologies Corporation | Single crystal articles having reduced anisotropy |
| US5055383A (en) * | 1988-11-17 | 1991-10-08 | International Business Machines Corporation | Process for making masks with structures in the submicron range |
| US20030145977A1 (en) * | 2000-01-19 | 2003-08-07 | Smashey Russell W. | Directionally solidified superalloy weld wire |
| US7624487B2 (en) | 2003-05-13 | 2009-12-01 | Quill Medical, Inc. | Apparatus and method for forming barbs on a suture |
| US7806908B2 (en) | 1993-05-03 | 2010-10-05 | Quill Medical, Inc. | Barbed tissue connector |
| US20100298871A1 (en) * | 2004-05-14 | 2010-11-25 | Quill Medical, Inc. | Self-retaining wound closure device including an anchoring loop |
| US7857829B2 (en) | 2001-06-29 | 2010-12-28 | Quill Medical, Inc. | Suture method |
| US7913365B2 (en) | 2001-08-31 | 2011-03-29 | Quill Medical, Inc. | Method of forming barbs on a suture and apparatus for performing same |
| US8083770B2 (en) | 2002-08-09 | 2011-12-27 | Quill Medical, Inc. | Suture anchor and method |
| US8641732B1 (en) | 2008-02-26 | 2014-02-04 | Ethicon, Inc. | Self-retaining suture with variable dimension filament and method |
| US8721681B2 (en) | 2002-09-30 | 2014-05-13 | Ethicon, Inc. | Barbed suture in combination with surgical needle |
| US8734485B2 (en) | 2002-09-30 | 2014-05-27 | Ethicon, Inc. | Sutures with barbs that overlap and cover projections |
| US8771313B2 (en) | 2007-12-19 | 2014-07-08 | Ethicon, Inc. | Self-retaining sutures with heat-contact mediated retainers |
| US8777987B2 (en) | 2007-09-27 | 2014-07-15 | Ethicon, Inc. | Self-retaining sutures including tissue retainers having improved strength |
| US8793863B2 (en) | 2007-04-13 | 2014-08-05 | Ethicon, Inc. | Method and apparatus for forming retainers on a suture |
| US8875607B2 (en) | 2008-01-30 | 2014-11-04 | Ethicon, Inc. | Apparatus and method for forming self-retaining sutures |
| US8876865B2 (en) | 2008-04-15 | 2014-11-04 | Ethicon, Inc. | Self-retaining sutures with bi-directional retainers or uni-directional retainers |
| US8932328B2 (en) | 2008-11-03 | 2015-01-13 | Ethicon, Inc. | Length of self-retaining suture and method and device for using the same |
| US8961560B2 (en) | 2008-05-16 | 2015-02-24 | Ethicon, Inc. | Bidirectional self-retaining sutures with laser-marked and/or non-laser marked indicia and methods |
| USRE45426E1 (en) | 1997-05-21 | 2015-03-17 | Ethicon, Inc. | Surgical methods using one-way suture |
| US9675341B2 (en) | 2010-11-09 | 2017-06-13 | Ethicon Inc. | Emergency self-retaining sutures and packaging |
| US10188384B2 (en) | 2011-06-06 | 2019-01-29 | Ethicon, Inc. | Methods and devices for soft palate tissue elevation procedures |
| US10492780B2 (en) | 2011-03-23 | 2019-12-03 | Ethicon, Inc. | Self-retaining variable loop sutures |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4115112A (en) * | 1977-07-21 | 1978-09-19 | General Electric Company | Cobalt-base alloy and article |
-
1971
- 1971-07-12 US US161912A patent/US3700433A/en not_active Expired - Lifetime
-
1972
- 1972-02-18 CA CA135,129A patent/CA958252A/en not_active Expired
- 1972-04-03 IL IL39127A patent/IL39127A/en unknown
- 1972-04-06 AU AU40841/72A patent/AU461071B2/en not_active Expired
- 1972-04-11 GB GB1657172A patent/GB1359938A/en not_active Expired
- 1972-04-17 FR FR7214930A patent/FR2145916A5/fr not_active Expired
- 1972-05-05 CH CH673972A patent/CH552678A/en not_active IP Right Cessation
- 1972-05-13 DE DE19722223455 patent/DE2223455A1/en active Pending
- 1972-05-16 SE SE7206376A patent/SE377136B/xx unknown
- 1972-05-19 NL NL7206795A patent/NL7206795A/xx unknown
- 1972-07-12 IT IT26882/72A patent/IT962731B/en active
Cited By (53)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4915907A (en) * | 1986-04-03 | 1990-04-10 | United Technologies Corporation | Single crystal articles having reduced anisotropy |
| US5055383A (en) * | 1988-11-17 | 1991-10-08 | International Business Machines Corporation | Process for making masks with structures in the submicron range |
| US7806908B2 (en) | 1993-05-03 | 2010-10-05 | Quill Medical, Inc. | Barbed tissue connector |
| US8246652B2 (en) | 1993-05-03 | 2012-08-21 | Ethicon, Inc. | Suture with a pointed end and an anchor end and with equally spaced yieldable tissue grasping barbs located at successive axial locations |
| USRE45426E1 (en) | 1997-05-21 | 2015-03-17 | Ethicon, Inc. | Surgical methods using one-way suture |
| US8466389B2 (en) * | 2000-01-19 | 2013-06-18 | General Electric Company | Directionally solidified superalloy weld wire |
| US20030145977A1 (en) * | 2000-01-19 | 2003-08-07 | Smashey Russell W. | Directionally solidified superalloy weld wire |
| US7857829B2 (en) | 2001-06-29 | 2010-12-28 | Quill Medical, Inc. | Suture method |
| US8764796B2 (en) | 2001-06-29 | 2014-07-01 | Ethicon, Inc. | Suture method |
| US8764776B2 (en) | 2001-06-29 | 2014-07-01 | Ethicon, Inc. | Anastomosis method using self-retaining sutures |
| US8747437B2 (en) | 2001-06-29 | 2014-06-10 | Ethicon, Inc. | Continuous stitch wound closure utilizing one-way suture |
| US8777988B2 (en) | 2001-06-29 | 2014-07-15 | Ethicon, Inc. | Methods for using self-retaining sutures in endoscopic procedures |
| US8777989B2 (en) | 2001-06-29 | 2014-07-15 | Ethicon, Inc. | Subcutaneous sinusoidal wound closure utilizing one-way suture |
| US8926659B2 (en) | 2001-08-31 | 2015-01-06 | Ethicon, Inc. | Barbed suture created having barbs defined by variable-angle cut |
| US8028387B2 (en) | 2001-08-31 | 2011-10-04 | Quill Medical, Inc. | System for supporting and cutting suture thread to create tissue retainers thereon |
| US8028388B2 (en) | 2001-08-31 | 2011-10-04 | Quill Medical, Inc. | System for cutting a suture to create tissue retainers of a desired shape and size |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB1359938A (en) | 1974-07-17 |
| CA958252A (en) | 1974-11-26 |
| SE377136B (en) | 1975-06-23 |
| AU4084172A (en) | 1973-10-11 |
| IL39127A0 (en) | 1972-08-30 |
| IT962731B (en) | 1973-12-31 |
| CH552678A (en) | 1974-08-15 |
| AU461071B2 (en) | 1975-04-29 |
| DE2223455A1 (en) | 1973-01-25 |
| IL39127A (en) | 1975-07-28 |
| NL7206795A (en) | 1973-01-16 |
| FR2145916A5 (en) | 1973-02-23 |
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