Inventor
TANG PING-WAH
US28 patents
Patents
28 patentsUS5681690AOct 28, 1997
Photographic dye-forming coupler, emulsion layer, element, and process
EASTMAN KODAK CO19 citations92
US6096494AAug 1, 2000
Silver halide photographic element containing improved cyan dye-forming phenolic coupler
EASTMAN KODAK CO21 citations89
US6143485ANov 7, 2000
Pyrazolotriazle dye-forming photographic coupler
EASTMAN KODAK CO7 citations73
US5667952ASep 16, 1997
Photographic material and process comprising a bicyclic pyrazolo coupler
EASTMAN KODAK CO9 citations73
US4804620AFeb 14, 1989
Photographic material containing a novel polymeric dye-forming coupler
EASTMAN KODAK CO7 citations73
US5698386ADec 16, 1997
Photographic dye-forming coupler, emulsion layer, element, and process
EASTMAN KODAK CO8 citations67
US5360710ANov 1, 1994
Color photographic materials containing polymeric couplers
EASTMAN KODAK CO2 citations62
US5342943AAug 30, 1994
Preparation of 1H pyrazolo [3,2-c]-S-triazole compounds
EASTMAN KODAK CO5 citations62
US5234805AAug 10, 1993
Photographic material and process comprising a pyrazolotriazole coupler
EASTMAN KODAK CO4 citations62
US5214194AMay 25, 1993
Coupler intermediates and their formation
EASTMAN KODAK CO8 citations62
US5262542ANov 16, 1993
Process for preparation of 1H-pyrazolo [1,5-b][1,2,4]triazole compounds by cyclization of N-(4-substituted-pyrazolyl)amidoxime
EASTMAN KODAK CO4 citations60
US6040126AMar 21, 2000
Photographic yellow dye-forming couplers
EASTMAN KODAK CO1 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
US5250400AOct 5, 1993
Photographic material and process comprising a pyrazolotriazole coupler
EASTMAN KODAK CO1 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
US5455147AOct 3, 1995
Methods of forming polymeric couplers
EASTMAN KODAK CO1 citations51
US5276158AJan 4, 1994
Method of preparing 5-amino-3-substituted-pyrazole
EASTMAN KODAK CO0 citations51
US6162598ADec 19, 2000
Silver halide photographic element containing improved yellow dye-forming coupler
EASTMAN KODAK CO0 citations50
US5851748ADec 22, 1998
Photographic materials and process comprising a particular acylacetanilide yellow dye-forming coupler
EASTMAN KODAK CO1 citations50
US5510492AApr 23, 1996
Process of preparing pyrazolo 1,5-b! 1,2,4! triazoles
EASTMAN KODAK CO1 citations50
US5248786ASep 28, 1993
Process for preparation of 1H-pyrazolo [1,5-b][1,2,4]triazole couplers and intermediate compounds
EASTMAN KODAK CO1 citations50
US5811230ASep 22, 1998
Photographic material comprising a bicyclic pyrazolo coupler
EASTMAN KODAK CO0 citations48
US5395968AMar 7, 1995
Intermediates and process for preparing magenta couplers
EASTMAN KODAK CO0 citations42
US5358836AOct 25, 1994
Photographic elements containing new magenta-dye-forming tris couplers
EASTMAN KODAK CO0 citations41
US5358837AOct 25, 1994
Photographic elements containing new magenta-dye-forming bis couplers
EASTMAN KODAK CO0 citations40