Inventor
THOMAS PATRICK D P
GB6 patents
Patents
6 patentsUS4480104AOct 30, 1984
Hydroquinone derivatives and their use in photographic materials
CIBA GEIGY AG1 citations60
US4443537AApr 17, 1984
Hydroquinone derivatives and their use in photographic materials
CIBA GEIGY AG2 citations60
US4426444AJan 17, 1984
Hydroquinone derivatives and their use in photographic materials
CIBA GEIGY AG1 citations60
US4410702AOct 18, 1983
Hydroquinone derivatives of pyridinecarboxylic acids
CIBA GEIGY AG2 citations60
US4353974AOct 12, 1982
Process for the production of photographic images and photographic materials used in this process
CIBA GEIGY AG4 citations60
US4417072ANov 22, 1983
Hydroquinone derivatives and their use in photographic materials
CIBA GEIGY AG1 citations49