US4857440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material and process (B)
Assignee: Eastman Kodak Co
•
Filing: 1988-06-30
•
Granted: 1989-08-15
•
Expires: 2008-06-30
Abstract
Abstract Photographic compound (A) capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement exhibits increased resistance to hydrolysis when the compound contains in a coupling position a coupling-off group represented by the formula: ##STR1## wherein Q, R q , R 1 , R 2 , R 3 , n and PUG are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process.
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 02:27
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07D249/00; C07D249/16; C07D249/18; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30576; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
147 words
A photographic element comprising a support, at least one photographic silver halide emulsion layer and at least one compound (A) represented by the formula CAR-LINK-PUG where CAR is a carrier moiety capable of releasing LINK-PUG during photographic processing upon reaction with oxidized developing agent; LINK-PUG is in turn capable of releasing a photographically useful group (PUG) by an intramolecular nucleophilic displacement reaction; and LINK-PUG is represented by the formula: ##STR33## wherein Q is N or CR z ; R q is alkyl, cycloalkyl, heterocyclyl or aryl, or R q together with R 1 , R 2 or R z can represent the atoms necessary to complete a non-aromatic ring; R z , R 1 and R 2 are independently alkyl, cycloalkyl, heterocyclyl, aryl or hydrogen; R 3 is alkyl, cycloalkyl, heterocyclyl or aryl; n is 0 or 1; and the LINK moiety enables increased resistance to hydrolysis.
Claim 2
Dependent Claim
147 words
A photographic element comprising a support, at least one photographic silver halide emulsion layer and at least one compound (A) represented by the formula CAR-LINK-PUG where CAR is a carrier moiety capable of releasing LINK-PUG during photographic processing upon reaction with oxidized developing agent; LINK-PUG is in turn capable of releasing a photographically useful group (PUG) by an intramolecular nucleophilic displacement reaction; and LINK-PUG is represented by the formula: ##STR33## wherein Q is N or CR z ; R q is alkyl, cycloalkyl, heterocyclyl or aryl, or R q together with R 1 , R 2 or R z can represent the atoms necessary to complete a non-aromatic ring; R z , R 1 and R 2 are independently alkyl, cycloalkyl, heterocyclyl, aryl or hydrogen; R 3 is alkyl, cycloalkyl, heterocyclyl or aryl; n is 0 or 1; and the LINK moiety enables increased resistance to hydrolysis.
Claim 3
Dependent Claim
33 words
A photographic element as in claim 1 wherein the LINK-PUG group is represented by the formula: ##STR34## wherein R 4 is alkyl, cycloalkyl, heterocyclyl or aryl and PUG is a photographically useful group.
Claim 4
Dependent Claim
33 words
A photographic element as in claim 1 wherein the LINK-PUG group is represented by the formula: ##STR35## wherein R 4 is alkyl, cycloalkyl, heterocyclyl or aryl and PUG is a photographically useful group.
Claim 5
Dependent Claim
33 words
A photographic element as in claim 1 wherein the LINK-PUG group is represented by the formula: ##STR36## wherein R 4 is alkyl, cycloalkyl, heterocyclyl or aryl and PUG is a photographically useful group.
Claim 6
Dependent Claim
45 words
A photographic element as in claim 1 wherein the compound (A) is a coupler represented by the formula: ##STR37## wherein COUP is a coupler moiety; R 5 is an electron donating group or an electron withdrawing group; and, Q is a releasable development inhibitor moiety.
Claim 7
Dependent Claim
13 words
A photographic element as in claim 1 wherein the compound (A) is ##STR38##
Claim 8
Dependent Claim
41 words
A photographic element as in claim 1 wherein the photographically useful group is a releasable development inhibitor, developing agent, development accelerator, bleach inhibitor, bleach accelerator, dye, dye precursor, stabilizer, coupler, nucleator, fixing agent, image toner, hardener, antifoggant, or ultraviolet radiation absorber.
Claim 9
Dependent Claim
34 words
A process of forming a photographic image which comprises developing an exposed photographic silver halide emulsion layer with a color developing agent in the presence of a compound (A) as defined in claim 1.
Claim 10
Dependent Claim
23 words
A process of forming a photographic image as in claim 8 wherein the compound (A) is a coupler as defined in claim 4.
Claim 11
Dependent Claim
12 words
A process as in claim 8 wherein the compound (A) is: ##STR39##
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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |