DR. PING TANG, MD, PH.D
Medical Practice in Rochester, NY

4612278, Sep 16, 1986

Jul 17, 1985

6/756138

Philip Lau - Rochester NY
Ping W. Tang - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 140, G03C 732

430381

Photographic silver halide materials comprise a polymeric coupler which is at least a copolymer having a repeating unit (A) which comprises at least one coupler moiety (COUP) capable of forming a dye upon coupling with an oxidized color developing agent and at least one repeating unit (B) which is derived from a monomer which is an alkoxyalkylacrylate. The polymeric coupler optionally comprises at least one repeating unit (C) derived from such monomers as those useful for repeating unit (A), those useful for repeating unit (B) and other monomers which can be selected to provide useful physical and chemical properties. The photographic material comprising such a polymeric coupler upon exposure and processing enables formation of a dye image having increased dye density.

5609996, Mar 11, 1997

Feb 29, 1996

8/608916

Ping W. Tang - Rochester NY
Stanley W. Cowan - Rochester NY
David J. Decker - Rochester NY
Terrence C. Mungal - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 738

430386

A photographic light sensitive silver halide emulsion layer has associated therewith a pyrazoloazole dye-forming coupler having the formula: ##STR1## wherein: R. sup. 1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom; X is hydrogen or a coupling-off group; L is a divalent linking group; R. sup. 2, R. sup. 3, and R. sup. 4 are independently hydrogen or substituent groups; and Z. sub. a, Z. sub. b, and Z. sub. c are independently --C(R')(R")--,. dbd. N--,. dbd. C(R')--, or --NH--, wherein R', and R" are independently H or a substituent, provided that one of either the Z. sub. a --Z. sub. b or the Z. sub. b --Z. sub. c bond is a double bond and the other is a single bond, and provided that when the Z. sub. b --Z. sub. c bond is a double bond, it may form part of a fused ring.

5811230, Sep 22, 1998

Oct 2, 1996

8/725266

Ping Wah Tang - Rochester NY
Wendell Smith - Fairport NY
Stanley W. Cowan - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 108, G03C 726, G03C 732

430558

Novel bicyclic pyrazolo couplers containing a fully substituted carbon at the 6-position of the bicyclic structure and a ballast group of formula (I): ##STR1## are useful in photographic materials and processes. The couplers exhibit increased coupling activity, and provide formation of dyes having improved maximum magenta image dye density, contrast, and photographic speed when employed in color photographic materials and processes. The variables are defined more specifically in the specification.

5360713, Nov 1, 1994

Nov 12, 1992

7/975200

Ping W. Tang - Rochester NY
Philip T. S. Lau - Rochester NY
Stanley W. Cowan - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 736

430556

Yellow dye-forming couplers of the acylacetanilide class, having an electron withdrawing group or electronegative element attached to the keto functional group, have excellent light-absorption characteristics and are useful in photographic elements.

5424179, Jun 13, 1995

Aug 11, 1994

8/289074

Ping W. Tang - Rochester NY
Terrence C. Mungal - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 738

430558

Novel cyclic azole couplers and photographic elements containing them are described. The couplers are represented by the following structure: ##STR1## wherein: COUP is a cyclic azole coupler moiety; R. sub. 1, R. sub. 2 and R. sub. 3 independently represent hydrogen or a substituent; L is a linking group joining the azole ring and the aryleneoxy group; G is a bi-valent linking group; and m is an integer of 0 to 2.

4914005, Apr 3, 1990

Aug 11, 1989

7/392756

Philip T. S. Lau - Rochester NY
Ping W. Tang - Rochester NY
Stanley W. Cowan - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 734, G03C 544

430377

The reduction of cyan image dye to a leuco compound in a color photographic element by ferrous ion contained in a bleach processing solution is inhibited by the presence in the element of a polymeric latex having recurring units that are derived from certain lower alkoxyacrylate monomers optionally copolymerized with recurring units derived from certain acrylic ionomers.

5441863, Aug 15, 1995

Jul 28, 1994

8/281898

Ping W. Tang - Rochester NY
Thomas H. Jozefiak - Rochester NY
David J. Decker - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 738

430558

Novel imidazo[3,2-a]imidazole cyan dye-forming couplers and photographic elements containing them are described. The couplers are represented by the following structure: ##STR1## wherein: EWG. sub. 1 and EWG. sub. 2 each independently represent an electron withdrawing group; X is hydrogen or a coupling-off group; and R. sup. 1 is hydrogen or a substituent group.

5358829, Oct 25, 1994

Dec 18, 1992

7/993921

Ping W. Tang - Rochester NY
Stanley W. Cowan - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 738

430386

Novel bicyclic pyrazolo couplers contain a sulfone group of formula (I): --L--NHC(. dbd. O)--(L). sub. n --B--SO. sub. 2 --R. sup. 1 I wherein: each L is independently a divalent group linking the adjacent groups; n is 0 or 1; B is a divalent group selected from aryl, aryloxy, aryloxyalkyl, and --C(R. sup. 2)(R. sup. 3)-- wherein R. sup. 2 and R. sup. 3 are independently hydrogen or alkyl; and R. sup. 1 is a substituted or unsubstituted alkyl having 1 to 22 carbon atoms These couplers are useful in photographic materials and processes. They exhibit improved color reproduction and dye light stability when employed in color photographic materials and processes.

5576150, Nov 19, 1996

Feb 29, 1996

8/608884

Ping W. Tang - Rochester NY
Stanley W. Cowan - Rochester NY
David J. Decker - Rochester NY
Daniel E. Corcoran - Webster NY

Eastman Kodak Company - Rochester NY

G03C 738

430386

The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye-forming coupler having formula: ##STR1## wherein: R. sub. 1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom; X is hydrogen or a coupling-off group; R. sub. 2, R. sub. 3, R. sub. 4, and R. sub. 6 are independently hydrogen or substituent groups; q is from 1 to 3; R. sub. 5 and R. sub. 7 are independently alkyl, alkoxy, aryl, or aryloxy groups; G is a substituent group and n is from 0 to 3; and Y is a substituent group and m is 0 to 4. The invention also provides a coupler compound, a photographic element containing the emulsion layer of the invention, and an imaging process.

5698386, Dec 16, 1997

Feb 29, 1996

8/608836

Ping Wah Tang - Rochester NY
David Joseph Decker - Rochester NY
Susan Marie Fischer - Rochester NY
Stanley Wray Cowan - Rochester NY

Eastman Kodak Company - Rochester NY

G03C 1005

430558

The invention provides a photographic light sensitive silver halide emulsion layer having associated therewith a pyrazolotriazole dye-forming coupler having the formula: ##STR1## wherein: R. sub. 1 is a substituent bonded to the pyrazolotriazole nucleus by a fully substituted carbon atom; X is hydrogen or a coupling-off group; R. sub. 2, R. sub. 3, R. sub. 4, and R. sub. 6 are independently hydrogen or substituent groups; R. sub. 5 is selected from the group consisting of alkyl, alkoxy, aryl, and aryloxy groups; R. sub. 7 is an alkyl group; and Y is a substituent group where m is 0 to 4. The invention also provides a coupler compound, a photographic element containing the emulsion layer of the invention, and an imaging process.