Inventor · disambiguated record
Ping-Wah Tang
Also filed as: TANG PING W · TANG PING-WAH
42 granted patents·203 citations·filing 1985–1998
97Inventor score
Top patents by PatentIndex Score
42 records- 0192US5441863APhotographic elements with heterocyclic cyan dye-forming couplersEASTMAN KODAK CO·Filed 1994·Granted Aug 15, 1995·26 cites·9 claims
- 0291US5681690APhotographic dye-forming coupler, emulsion layer, element, and processEASTMAN KODAK CO·Filed 1996·Granted Oct 28, 1997·19 cites·11 claims
- 0389US6096494ASilver halide photographic element containing improved cyan dye-forming phenolic couplerEASTMAN KODAK CO·Filed 1998·Granted Aug 1, 2000·21 cites·19 claims
- 0479US4612278APhotographic materials and process comprising polymeric couplers with alkoxyalkylacrylate comonomersEASTMAN KODAK CO·Filed 1985·Granted Sep 16, 1986·17 cites·23 claims
- 0576US5698386APhotographic dye-forming coupler, emulsion layer, element, and processEASTMAN KODAK CO·Filed 1996·Granted Dec 16, 1997·8 cites·18 claims
- 0675US5667952APhotographic material and process comprising a bicyclic pyrazolo couplerEASTMAN KODAK CO·Filed 1994·Granted Sep 16, 1997·9 cites·7 claims
- 0774US6143485APyrazolotriazle dye-forming photographic couplerEASTMAN KODAK CO·Filed 1998·Granted Nov 7, 2000·7 cites·10 claims
- 0874US5576150APhotographic dye-forming coupler, emulsion layer, element, and processEASTMAN KODAK CO·Filed 1996·Granted Nov 19, 1996·8 cites·19 claims
- 0969US5609996APhotographic emulsion layer containing pyrazoloazole coupler exhibiting improved dye light fadeEASTMAN KODAK CO·Filed 1996·Granted Mar 11, 1997·6 cites·22 claims
- 1065US5122450ABiochemical reagentRESEARCH CORP·Filed 1986·Granted Jun 16, 1992·26 cites·56 claims
- 1161US5358829APhotographic material and process comprising a bicyclic pyrazolo couplerEASTMAN KODAK CO·Filed 1992·Granted Oct 25, 1994·5 cites·7 claims
- 1260US4804620APhotographic material containing a novel polymeric dye-forming couplerEASTMAN KODAK CO·Filed 1987·Granted Feb 14, 1989·7 cites·8 claims
- 1357US5342943APreparation of 1H pyrazolo [3,2-c]-S-triazole compoundsEASTMAN KODAK CO·Filed 1993·Granted Aug 30, 1994·5 cites·7 claims
- 1456US5234805APhotographic material and process comprising a pyrazolotriazole couplerEASTMAN KODAK CO·Filed 1992·Granted Aug 10, 1993·4 cites·12 claims
- 1556US4914005APhotographic element containing a cyan dye forming couplerEASTMAN KODAK CO·Filed 1989·Granted Apr 3, 1990·6 cites·8 claims
- 1654US5214194ACoupler intermediates and their formationEASTMAN KODAK CO·Filed 1991·Granted May 25, 1993·8 cites·4 claims
- 1752US5262542AProcess for preparation of 1H-pyrazolo [1,5-b][1,2,4]triazole compounds by cyclization of N-(4-substituted-pyrazolyl)amidoximeEASTMAN KODAK CO·Filed 1992·Granted Nov 16, 1993·4 cites·9 claims
- 1849US5100772AMagenta dye forming coupler for photographic materialEASTMAN KODAK CO·Filed 1990·Granted Mar 31, 1992·3 cites·7 claims
- 1946US5360710AColor photographic materials containing polymeric couplersEASTMAN KODAK CO·Filed 1992·Granted Nov 1, 1994·2 cites·13 claims
- 2045US5427898AYellow couplers having an arloxy coupling-off group which contains an ortho polarizable functional groupEASTMAN KODAK CO·Filed 1994·Granted Jun 27, 1995·2 cites·18 claims
- 2143US5360713AYellow dye-forming couplers and color photographic elements containing these couplersEASTMAN KODAK CO·Filed 1992·Granted Nov 1, 1994·2 cites·15 claims
- 2241US5851748APhotographic materials and process comprising a particular acylacetanilide yellow dye-forming couplerEASTMAN KODAK CO·Filed 1996·Granted Dec 22, 1998·1 cites·18 claims
- 2340US6130032APhotographic elements containing improved yellow dye-forming couplersEASTMAN KODAK CO·Filed 1997·Granted Oct 10, 2000·1 cites·16 claims
- 2438US6040126APhotographic yellow dye-forming couplersEASTMAN KODAK CO·Filed 1998·Granted Mar 21, 2000·1 cites·11 claims
- 2538US5510492AProcess of preparing pyrazolo 1,5-b! 1,2,4! triazolesEASTMAN KODAK CO·Filed 1993·Granted Apr 23, 1996·1 cites·4 claims
- 2638US5250400APhotographic material and process comprising a pyrazolotriazole couplerEASTMAN KODAK CO·Filed 1992·Granted Oct 5, 1993·1 cites·14 claims
- 2738US5248786AProcess for preparation of 1H-pyrazolo [1,5-b][1,2,4]triazole couplers and intermediate compoundsEASTMAN KODAK CO·Filed 1992·Granted Sep 28, 1993·1 cites·8 claims
- 2837US5864042AProcess for preparation of a 4-amino-5-mercapto-3-substituted- 1,2,4!triazole compoundEASTMAN KODAK CO·Filed 1998·Granted Jan 26, 1999·1 cites·14 claims
- 2933US5457020APhotographic material and process comprising a bicyclic pyrazolo couplerEASTMAN KODAK CO·Filed 1992·Granted Oct 10, 1995·0 cites·10 claims
- 3033US5455147AMethods of forming polymeric couplersEASTMAN KODAK CO·Filed 1994·Granted Oct 3, 1995·1 cites·14 claims
- 3133US5340708APhotographic elements containing new dye-forming tris couplersEASTMAN KODAK CO·Filed 1993·Granted Aug 23, 1994·0 cites·7 claims
- 3232US6162598ASilver halide photographic element containing improved yellow dye-forming couplerEASTMAN KODAK CO·Filed 1998·Granted Dec 19, 2000·0 cites·12 claims
- 3332US5358838APhotographic elements containing new yellow-dye-forming tris couplersEASTMAN KODAK CO·Filed 1993·Granted Oct 25, 1994·0 cites·6 claims
- 3432US5358835APhotographic elements containing new yellow-dye-forming tris couplersEASTMAN KODAK CO·Filed 1993·Granted Oct 25, 1994·0 cites·6 claims
- 3532US5276158AMethod of preparing 5-amino-3-substituted-pyrazoleEASTMAN KODAK CO·Filed 1992·Granted Jan 4, 1994·0 cites·10 claims
- 3632US5237030APolymeric couplers prepared in the presence of a coupler solventEASTMAN KODAK CO·Filed 1990·Granted Aug 17, 1993·0 cites·1 claims
- 3731US5424179APhotographic element with a cyclic azole coupler having a saccharin substituentEASTMAN KODAK CO·Filed 1994·Granted Jun 13, 1995·0 cites·6 claims
- 3831US5358836APhotographic elements containing new magenta-dye-forming tris couplersEASTMAN KODAK CO·Filed 1993·Granted Oct 25, 1994·0 cites·8 claims
- 3931US4992359APolymeric couplersEASTMAN KODAK CO·Filed 1990·Granted Feb 12, 1991·0 cites·6 claims
- 4030US5811230APhotographic material comprising a bicyclic pyrazolo couplerEASTMAN KODAK CO·Filed 1996·Granted Sep 22, 1998·0 cites·5 claims
- 4130US5358837APhotographic elements containing new magenta-dye-forming bis couplersEASTMAN KODAK CO·Filed 1993·Granted Oct 25, 1994·0 cites·8 claims
- 4223US5395968AIntermediates and process for preparing magenta couplersEASTMAN KODAK CO·Filed 1993·Granted Mar 7, 1995·0 cites·9 claims
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