Patent US5021333A successfully refreshed from Google Patents.
US5021333A
Expired / Lapsed
US
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Color photographic element, compounds and process
Assignee: Eastman Kodak Co
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Filing: 1990-08-24
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Granted: 1991-06-04
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Expires: 2010-08-24
Abstract
Abstract A photographic yellow dye-forming coupler is represented by the formula: ##STR1## wherein: R 1 is alkyl of 1 to 4 carbon atoms; ball is a ballast group of such size and configuration as to render the coupler nondiffusible in a photographic element; Y is CO, PO 3 or SO 2 ; X is an aryloxy coupling-off group; and n is 1 or, when Y is PO 3 , n is 2. Such a coupler is useful in a color photographic silver halide element and process to provide improved activity.
Inventors
- 👤 Llewellyn J. Leyshon
- 👤 Paul R. Buckland
- 👤 Paul A. Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:01
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/01; C07C311/02; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a yellow dye-forming coupler represented by the formula: ##STR20## wherein: R 1 is alkyl of 1 to 4 carbon atoms; ball is a ballast group of such size and configuration as to render the coupler nondiffusible in a photographic element; Y is CO, PO 3 or SO 2 ; X is an aryloxy coupling-off group; and n is 1 or, when Y is PO 3 , n is 2.
Claim 2
Dependent Claim
86 words
A color photographic element comprising a support bearing at least one photographic silver halide emulsion layer and a yellow dye-forming coupler represented by the formula: ##STR20## wherein: R 1 is alkyl of 1 to 4 carbon atoms; ball is a ballast group of such size and configuration as to render the coupler nondiffusible in a photographic element; Y is CO, PO 3 or SO 2 ; X is an aryloxy coupling-off group; and n is 1 or, when Y is PO 3 , n is 2.
Claim 3
Dependent Claim
18 words
A color photographic element as in claim 1, wherein ball comprises at least one alkyl or aryl moiety.
Claim 4
Dependent Claim
27 words
A color photographic element as in claim 1, wherein ball comprises an aryl moiety substituted with at least one alkyl group containing 4 to 10 carbon atoms.
Claim 5
Dependent Claim
12 words
A color photographic element as in claim 1, wherein ball is: ##STR21##
Claim 6
Dependent Claim
28 words
A color photographic element as in claim 1, wherein X is a phenoxy group containing electron-withdrawing or -ionizable substituents in at least one of the ortho- and para-positions.
Claim 7
Dependent Claim
12 words
A color photographic element as in claim 1 wherein X is: ##STR22##
Claim 8
Dependent Claim
15 words
A color photographic element as in claim 1, also comprising a blocked bis-phenol dye stabilizer.
Claim 9
Dependent Claim
92 words
A color photogrphic element as in claim 1, comprising at least one yellow dye image-forming unit comprised of at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler as defined in claim 1; at least one magenta dye image-forming unit comprised of at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler; and at least one cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |