Teh Hsuan Chen

US Patent:

52885933, Feb 22, 1994

Filed:

Jun 24, 1992

Appl. No.:

7/903784

Inventors:

William J. Begley - Webster NY
Drake M. Michno - Webster NY
Hans G. Ling - Rochester NY
Teh H. Chen - Fairport NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 732
G03C 734

US Classification:

430382

Abstract:

A photographic element comprises a support bearing at least one photographic silver halide emulsion layer and at least one coupler (A) having a water solubilizing group wherein coupler (A) forms a compound that is washed out of the photographic element during photographic processing and forms a coupling-off group represented by the formula: --X--Rel. sup. 2 --T. sup. 2 --INH wherein; X is selected from oxygen, nitrogen or sulfur; X--Rel. sup. 2 contains a photographic ballast and is a releasing group for releasing T. sup. 2 --INH from X--Rel. sup. 2 by elimination electron transfer reaction during photographic processing without substantial delay of releasing; T. sup. 2 is a timing group that releases INH by elimination electron transfer reaction with timing delay during photographic processing; INH is a development inhibitor group. The photographic coupler (A) enables formation of easily removable dyes in photographic elements and processes that provide images having improved acutance, stability and interimage effects.

US Patent:

56703015, Sep 23, 1997

Filed:

Jan 24, 1996

Appl. No.:

8/590644

Inventors:

William James Begley - Webster NY
Teh Hsuan Chen - Fairport NY
Frank Dino Coms - Fairport NY
Donald Singleton - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 7305

US Classification:

430382

Abstract:

A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula ##STR1## wherein COUP is a coupler moiety having a coupling site to which T. sup. 1 is attached; T. sup. 1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated chain, or by nucleophilic displacement reaction, to release from HETERO; HETERO is a heterocyclic group containing at least two heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein one of the heteroatoms is directly attached to T. sup. 1 ; R. sup. 1 and R. sup. 2 are independently selected from hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring; and PUG is a photographically useful group.

US Patent:

59121106, Jun 15, 1999

Filed:

Jun 10, 1997

Appl. No.:

8/872496

Inventors:

William James Begley - Webster NY
Teh Hsuan Chen - Fairport NY
Frank Dino Coms - Fairport NY
Donald Singleton - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 108
G03C 726
G03C 732

US Classification:

430544

Abstract:

A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula ##STR1## wherein COUP is a coupler moiety having a coupling site to which T. sup. 1 is attached; T. sup. 1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated chain, or by nucleophilic displacement reaction, to release from HETERO; HETERO is a heterocyclic group containing at least two heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein one of the heteroatoms is directly attached to T. sup. 1 ; R. sup. 1 and R. sup. 2 are independently selected from hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring; and PUG is a photographically useful group.

US Patent:

52799298, Jan 18, 1994

Filed:

Jun 24, 1992

Appl. No.:

7/903783

Inventors:

William J. Begley - Webster NY
Drake M. Michno - Webster NY
Hans G. Ling - Rochester NY
Teh H. Chen - Fairport NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 732
G03C 734

US Classification:

430382

Abstract:

A photographic element comprises a support bearing at least one photographic silver halide emulsion layer and at least one coupler (A) having a water solubilizing group wherein coupler (A) forms a compound that is washed out of the photographic element during photographic processing and forms a coupling-off group represented by the formula: --X--Rel. sup. 3 --T. sup. 3 --INH wherein; X is selected from oxygen, nitrogen or sulfur X--Rel. sup. 3 contains a photographic ballast and is a releasing group for releasing T. sup. 3 --INH from X--Rel. sup. 3 by intramolecular displacement reaction during photographic processing without substantial delay of releasing; T. sup. 3 is a timing group that releases INH by intramolecular displacement reaction with timing delay during photographic processing; INH is a development inhibitor group; The photographic coupler (A) enables formation of easily removable dyes in photographic elements and processes that provide images having improved acutance, stability and interimage effects.

US Patent:

56862342, Nov 11, 1997

Filed:

Jan 24, 1996

Appl. No.:

8/590661

Inventors:

William James Begley - Webster NY
Teh Hsuan Chen - Fairport NY
Donald Singleton - Rochester NY
Frank Dino Coms - Fairport NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 7305
G03C 740

US Classification:

430544

Abstract:

A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula COUP--T. sup. 1 --T. sup. 2 --(T. sup. 3). sub. b --PUG wherein COUP is a coupler moiety having a coupling site to which T. sup. 1 is attached; T. sup. 1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated or unconjugated chain, or by nucleophilic displacement reaction, to release T. sup. 2, T. sup. 2 being an indazole timing or linking group which, after release from T. sup. 1, functions by electron transfer down a conjugated chain to release T. sup. 3 or PUG, and which is represented by the formula: ##STR1## wherein ** denotes the point of attachment to T. sup. 1 and *** denotes the point of attachment to T. sup.

US Patent:

59626569, Oct 5, 1999

Filed:

Jun 10, 1997

Appl. No.:

8/872118

Inventors:

William James Begley - Webster NY
Teh Hsuan Chen - Fairport NY
Donald Singleton - Rochester NY
Frank Dino Coms - Fairport NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07D40312
C07D40314
C07D23156

US Classification:

534651

Abstract:

A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula COUP--T. sup. 1 --T. sup. 2 --(T. sup. 3). sub. b --PUG wherein COUP is a coupler moiety having a coupling site to which T. sup. 1 is attached; T. sup. 1 and T3 are timing or linking groups; T. sup. 2 is an indazole timing or linking group which, after release from T. sup. 1, functions by electron transfer down a conjugated chain to release T. sup. 3 or PUG, and which is represented by the formula: ##STR1## wherein ** denotes the point of attachment to T. sup. 1 and *** denotes the point of attachment to T. sup. 3 or PUG; R. sup. 1 and R. sup. 2 are independently selected from hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring; V is independently a substituent group as further defined; q is 0, 1, 2, 3 or 4; b is 0 or 1; and PUG is a photographically useful group.

US Patent:

53344901, Aug 2, 1994

Filed:

Jun 30, 1992

Appl. No.:

7/906630

Inventors:

William J. Begley - Webster NY
Teh H. Chen - Fairport NY
David S. Bailey - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 738
G03C 732

US Classification:

430382

Abstract:

Photographic compound (A) capable, upon oxidative coupling, of forming a dye, comprises in the coupling position, a coupling-off group that comprises in sequence, a releasable benzotriazole group attached to a triazole, tetrazole, oxadiazole, thiaoxadiazole, or thiadiazole inhibitor group represented by the formula: ##STR1## wherein R. sub. a, R. sub. b, R. sub. c R. sub. 1, R. sub. 2 and Q are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process to provide improved images.