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Publication numberDE59104782 D1
Publication typeGrant
Application numberDE1991504782
Publication date6 Apr 1995
Filing date27 Nov 1991
Priority date5 Dec 1990
Also published asCA2056854A1, EP0489689A1, EP0489689B1, US5208354, US5407885
Publication number1991504782, 91504782, DE 59104782 D1, DE 59104782D1, DE-D1-59104782, DE1991504782, DE59104782 D1, DE59104782D1, DE91504782
InventorsWalter Dr Fischer, Juergen Dr Finter, Heinz Spahni
ApplicantCiba Geigy Ag
Export CitationBiBTeX, EndNote, RefMan
Photochrome Naphthacenchinone, Verfahren zu deren Herstellung und deren Verwendung. Photochromic naphthacenequinones, processes for their preparation and their use. translated from German
DE 59104782 D1
Abstract  available in
Description  available in
Claims  available in
International ClassificationC07C255/54, C07C50/24, C09K9/02, C07C69/94, C07C67/30, C07C50/36, G03C1/73, C07C46/00, C07C69/92, C07C253/30, C09B3/58
Cooperative ClassificationC09B3/58, C07C50/36, C07C50/24, C09K9/02, G03C1/73
European ClassificationC07C50/36, C07C50/24, C09K9/02, C09B3/58, G03C1/73
Legal Events
28 Mar 19968364No opposition during term of opposition
9 Oct 19978327Change in the person/name/address of the patent owner
10 Dec 19988339Ceased/non-payment of the annual fee