P

Inventor

LAU PHILIP T S

US43 patents

Patents

43 patents
US4248962AFeb 3, 1981

Photographic emulsions, elements and processes utilizing release compounds

EASTMAN KODAK CO171 citations99
US4333999AJun 8, 1982

Cyan dye-forming couplers

EASTMAN KODAK CO85 citations96
US4401752AAug 30, 1983

Aryloxy substituted photographic couplers and photographic elements and processes employing same

EASTMAN KODAK CO40 citations92
US5686235ANov 11, 1997

Photographic elements containing cyan dye-forming coupler having a sulfone ballast group

EASTMAN KODAK CO31 citations89
US5118599AJun 2, 1992

Yellow couplers for photographic elements and processes

EASTMAN KODAK CO26 citations89
US4552834ANov 12, 1985

Enhanced bleaching of photographic elements containing silver halide and adsorbed dye

EASTMAN KODAK CO27 citations86
US5888716AMar 30, 1999

Photographic element containing improved coupler set

EASTMAN KODAK CO18 citations82
US5141844AAug 25, 1992

Polymeric dye-forming couplers

EASTMAN KODAK CO6 citations74
US4777120AOct 11, 1988

Photographic element and process comprising a masking coupler

EASTMAN KODAK CO16 citations74
US4157919AJun 12, 1979

Silver halide emulsions containing yellow-dye-forming couplers

EASTMAN KODAK CO9 citations74
US5262284ANov 16, 1993

Arylidene pyrazolone coupler

EASTMAN KODAK CO9 citations73
US5055385AOct 8, 1991

Photographic elements containing release compounds-II

EASTMAN KODAK CO10 citations73
US5034311AJul 23, 1991

Photographic elements containing release compounds I

EASTMAN KODAK CO8 citations73
US4804620AFeb 14, 1989

Photographic material containing a novel polymeric dye-forming coupler

EASTMAN KODAK CO7 citations73
US5834166ANov 10, 1998

Photographic element containing a particular cyan dye-forming coupler

EASTMAN KODAK CO2 citations63
US4435495AMar 6, 1984

Release of photographic reagents with 3-pyrazolidone developing agents

EASTMAN KODAK CO3 citations63
US5726002AMar 10, 1998

Photographic element containing a particular cyan coupler dispersed in a phenolic solvent

EASTMAN KODAK CO3 citations62
US5382502AJan 17, 1995

Hydroxyquinoline cyan couplers and their process of production

EASTMAN KODAK CO3 citations62
US5360713ANov 1, 1994

Yellow dye-forming couplers and color photographic elements containing these couplers

EASTMAN KODAK CO2 citations62
US5342943AAug 30, 1994

Preparation of 1H pyrazolo [3,2-c]-S-triazole compounds

EASTMAN KODAK CO5 citations62
US5091291AFeb 25, 1992

Alkyl substituted photographic couplers and photographic elements and processes employing same

EASTMAN KODAK CO2 citations62
US4914005AApr 3, 1990

Photographic element containing a cyan dye forming coupler

EASTMAN KODAK CO6 citations62
US5670302ASep 23, 1997

Photographic elements containing new magenta dye-forming couplers

EASTMAN KODAK CO4 citations59
US3998642ADec 21, 1976

Silver halide emulsions with incorporated 4,6-difluorophenolic couplers

EASTMAN KODAK CO6 citations59
US5427898AJun 27, 1995

Yellow couplers having an arloxy coupling-off group which contains an ortho polarizable functional group

EASTMAN KODAK CO2 citations58
US5614357AMar 25, 1997

Photographic element containing a particular cyan coupler bearing a sulfonyl containing ballast

EASTMAN KODAK CO1 citations52
US5523199AJun 4, 1996

Photographic element and process employing magenta azine dye-forming couplers

EASTMAN KODAK CO1 citations52
US5508148AApr 16, 1996

Photographic element containing a novel cyan dye forming coupler and process for its use

EASTMAN KODAK CO0 citations52
US5476757ADec 19, 1995

Photographic element containing a novel cyan dye forming coupler and process for its use

EASTMAN KODAK CO1 citations52
US5457020AOct 10, 1995

Photographic material and process comprising a bicyclic pyrazolo coupler

EASTMAN KODAK CO0 citations52
US5457008AOct 10, 1995

Photographic element containing a novel cyan dye forming coupler and process for its use

EASTMAN KODAK CO0 citations52
US5358838AOct 25, 1994

Photographic elements containing new yellow-dye-forming tris couplers

EASTMAN KODAK CO0 citations52
US5358835AOct 25, 1994

Photographic elements containing new yellow-dye-forming tris couplers

EASTMAN KODAK CO0 citations52
US5340708AAug 23, 1994

Photographic elements containing new dye-forming tris couplers

EASTMAN KODAK CO0 citations52
US5237030AAug 17, 1993

Polymeric couplers prepared in the presence of a coupler solvent

EASTMAN KODAK CO0 citations52
US4992359AFeb 12, 1991

Polymeric couplers

EASTMAN KODAK CO0 citations52
US4990436AFeb 5, 1991

Cyan dye-forming couplers and photographic recording materials containing same

EASTMAN KODAK CO0 citations52
US5681689AOct 28, 1997

Photographic material containing acrylate or acrylamide based yellow dye-forming couplers

EASTMAN KODAK CO0 citations51
US5654132AAug 5, 1997

Photographic materials and process comprising ureido naphtholic cyan couplers

EASTMAN KODAK CO1 citations51
US5043469AAug 27, 1991

Process for preparing 5-substituted aminophenols

EASTMAN KODAK CO0 citations51
US5358836AOct 25, 1994

Photographic elements containing new magenta-dye-forming tris couplers

EASTMAN KODAK CO0 citations41
US4940812AJul 10, 1990

5-substituted aminophenols

EASTMAN KODAK CO0 citations41
US5358837AOct 25, 1994

Photographic elements containing new magenta-dye-forming bis couplers

EASTMAN KODAK CO0 citations40