Inventor
JAN GERALD
22 patents
⚠️ This page may combine multiple inventors who share the name “JAN GERALD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CIBA GEIGY AG
14 patentsUS4521591AJun 4, 1985
Oil-soluble disazo dyes and their use in color-photographic recording materials for the silver dye bleach process
CIBA GEIGY AG17 citations73
US4379819AApr 12, 1983
Color-photographic recording material for the silver dye bleach process
CIBA GEIGY AG12 citations73
US4266011AMay 5, 1981
Process for the production of colored photographic images by the silver dye-bleach process
CIBA GEIGY AG8 citations73
US4304846ADec 8, 1981
Method for processing silver dye-bleach materials
CIBA GEIGY AG18 citations72
US4404273ASep 13, 1983
Process for the production of photographic color images by the silver dye bleach process
CIBA GEIGY AG8 citations71
US4138256AFeb 6, 1979
Method of processing photographic silver dye bleach materials
CIBA GEIGY AG7 citations71
US4456668AJun 26, 1984
Azo dyes containing phosphamic acid diester groups
CIBA GEIGY AG2 citations62
US4323682AApr 6, 1982
Quinoxalines and their use in photographic processes
CIBA GEIGY AG3 citations61
US4202698AMay 13, 1980
Quinoxalines and their use in photographic processes
CIBA GEIGY AG5 citations61
US4145217AMar 20, 1979
Quinoxalines and their use in photographic processes
CIBA GEIGY AG2 citations61
US4465763AAug 14, 1984
Process for the production of photographic color images by the silver dye bleach process
CIBA GEIGY AG2 citations60
US4357280ANov 2, 1982
Use of tertiary phosphines in photographic silver dye bleach materials
CIBA GEIGY AG2 citations60
US4409143AOct 11, 1983
Monoazo dyes containing phosphamic acid diester groups
CIBA GEIGY AG0 citations51
US4216320AAug 5, 1980
Quinoxaline bleach catalysts
CIBA GEIGY AG0 citations51
ILFORD IMAGING CH GMBH
6 patentsUS6068687AMay 30, 2000
Azo dyes and their preparation and use
ILFORD IMAGING CH GMBH18 citations83
US7828886B2Nov 9, 2010
Anthrapyridone dyes and their preparation and use
ILFORD IMAGING CH GMBH7 citations73
US6320031B1Nov 20, 2001
Monoazo dyes and their preparation and use
ILFORD IMAGING CH GMBH12 citations73
US5824785AOct 20, 1998
Dyes for ink jet printing
ILFORD IMAGING CH GMBH15 citations73
US6562115B2May 13, 2003
Azo dyes and their preparation and use
ILFORD IMAGING CH GMBH4 citations62
US7632345B2Dec 15, 2009
Phthalocyanine dyes and their preparation and use
ILFORD IMAGING CH GMBH0 citations51