Patent US4847185A successfully refreshed from Google Patents.
US4847185A
Expired / Lapsed
US
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Photographic material and process (A)
Assignee: Eastman Kodak Co
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Filing: 1988-06-30
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Granted: 1989-07-11
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Expires: 2008-06-30
Abstract
Abstract Photographic compounds capable of releasing a photographically useful group (PUG) by means of an intramolecular nucleophilic displacement provide increased image acutance when a coupling-off group in the coupling position of the compound is a group of the formula: <CHEM> wherein PUG is a photographically useful group; Q is N or C-R where R is hydrogen or a substituent that does not adversely affect imaging; and Z represents atoms completing a non-aromatic, heterocyclic ring system. The photographic compounds are useful in photographic materials and processes and enable increased acutance of developed images.
Inventors
- 👤 William J. Begley
- 👤 Michael J. Carmody
- 👤 John M. Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D255/00; C07D255/04; C07D401/00; C07D401/02; C07D401/12; C07D403/00; C07D403/02; C07D403/06; C07D403/12; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30576; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A photographic element comprising a support bearing at least one photographic silver halide emulsion layer and at least one compound (A) having in a coupling position a coupling-off group capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement wherein the compound (A) contains in the coupling position a releasable group represented by the formula: ##STR37## wherein Q is N or C--R 1 , where R 1 is hydrogen, unsubstituted or substituted alkyl, or unsubstituted or substituted aryl; PUG is a photographically useful group; and Z represents the atoms necessary to complete a non-aromatic, heterocyclic ring.
Claim 2
Dependent Claim
99 words
A photographic element comprising a support bearing at least one photographic silver halide emulsion layer and at least one compound (A) having in a coupling position a coupling-off group capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement wherein the compound (A) contains in the coupling position a releasable group represented by the formula: ##STR37## wherein Q is N or C--R 1 , where R 1 is hydrogen, unsubstituted or substituted alkyl, or unsubstituted or substituted aryl; PUG is a photographically useful group; and Z represents the atoms necessary to complete a non-aromatic, heterocyclic ring.
Claim 3
Dependent Claim
49 words
A photographic element as in claim 1 wherein the releaseable group is: ##STR38## wherein Q is N or C--R 1 , where R 1 is hydrogen, alkyl or aryl; Z 1 is (CH 2 ) m where m is 3 or 4; and PUG is a photographically useful group.
Claim 4
Dependent Claim
15 words
A photographic element as in claim 1 wherein the compound (A) is a dye-forming coupler.
Claim 5
Dependent Claim
23 words
A photographic element comprising a support bearing at least one silver halide emulsion layer and a photographic coupler represented by the formula: ##STR39##
Claim 6
Dependent Claim
23 words
A photographic element comprising a support bearing at least one silver halide emulsion layer and a photographic coupler represented by the formula: ##STR39##
Claim 7
Dependent Claim
23 words
A photographic element comprising a support bearing at least one silver halide emulsion layer and a photographic coupler represented by the formula: ##STR40##
Claim 8
Dependent Claim
23 words
A photographic element comprising a support bearing at least one silver halide emulsion layer and a photographic coupler represented by the formula: ##STR40##
Claim 9
Dependent Claim
35 words
A photographic element as in claim 1 wherein PUG is a development inhibitor, dye, dye precursor, coupler, developing agent, ultraviolet radiation absorber, bleach inhibitor, bleach accelerator, development accelerator, silver complexing agent, fogging agent, or antifoggant.
Claim 10
Dependent Claim
63 words
A photographic element as in claim 1 comprising a support bearing at least one red-sensitive silver halide emulsion layer having associated therewith a cyan dye image providing material, at least one green-sensitive silver halide emulsion layer having associated therewith a magenta dye image providing material, and at least one blue-sensitive silver halide emulsion layer having associated therewith a yellow dye image providing material.
Claim 11
Dependent Claim
100 words
A process of forming a photographic image which comprises developing an exposed photographic silver halide emulsion with a color developing agent in the presence of a photographic coupler (A) capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement wherein the coupler contains in the coupling position a releasable group represented by the formula: ##STR41## wherein Q is N or C--R 1 , where R 1 is hydrogen, unsubstituted or substituted alkyl, or unsubstituted or substituted aryl; PUG is a photographically useful group; and Z represents a bond or the atoms necessary to complete a non-aromatic ring.
Claim 12
Dependent Claim
100 words
A process of forming a photographic image which comprises developing an exposed photographic silver halide emulsion with a color developing agent in the presence of a photographic coupler (A) capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement wherein the coupler contains in the coupling position a releasable group represented by the formula: ##STR41## wherein Q is N or C--R 1 , where R 1 is hydrogen, unsubstituted or substituted alkyl, or unsubstituted or substituted aryl; PUG is a photographically useful group; and Z represents a bond or the atoms necessary to complete a non-aromatic ring.
Claim 13
Dependent Claim
46 words
A process as in claim 8 wherein the releasable group is: ##STR42## wherein Q is N or C--R 1 , where R 1 is hydrogen, alkyl or aryl; Z 1 is (CH 2 ) m is 3 or 4; and PUG is a photographically useful group.
References Cited (Backward Citations)
US3311476A
Cited
US4248962A
Cited
US4409323A
Cited
JPS60218645A
Cited
JPS61156126A
Cited
EP0255085A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |