US5079139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material
Assignee: Eastman Kodak Co
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Filing: 1989-09-05
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Granted: 1992-01-07
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Expires: 2009-09-05
Abstract
Abstract A photosensitive photographic material is described comprising a support bearing a silver halide emulsion layer sensitised with a dye of the general formula: <CHEM> wherein Y is S or Se, L<1>, L<2>, L<3>, L<4> and L<5> are each independently substituted or unsubsituted methine groups, A is N-R<3>, O or S, B is N-R<4> when A is O, or N-R<4>, S, or O when A is N-R<3>, R<1>, R<2>, R<3> and R<4> are each a substituted or unsubstituted alkyl or a substituted or unsubstituted aryl group, R<5> is an alkyl group of 1-4 carbon atoms, n is 0, 1 or 2, and X is a counterion, and wherein at least two of R<1>, R<2>, R<3> and R<4> are substituted with an acid or acid salt substituent.
Inventors
- 👤 Walter Bolger
- 👤 John D. Mee
- 👤 Kenneth G. Harbison
- 👤 Hwei-Ling Yau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/26; C; C09; C09B; C09B23/00; C09B23/0075; G03C2200/00; G03C2200/39; G03C2200/53; Y; Y10; Y10S; Y10S430/00; Y10S430/134
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A photographic material comprising a support bearing a silver halide emulsion layer sensitized with a dye of the formula: ##STR7## wherein Y is S or Se, L 1 , L 2 , L 3 , L 4 and L 5 are each independently substituted or unsubstituted methine groups, A is N--R 3 or O, B is N--R 4 when A is O, or N--R 4 , S, or O when A is N--R 3 , R 1 and R 2 are each a substituted or unsubstituted alkyl or a substituted or unsubstituted aryl group, R 5 is an alkyl group of 1-4 carbon atoms, n is 0, 1, or 2, and X is a counterion, and wherein at least two of R 1 , R 2 , R 3 and R 4 are substituted with an acid or acid salt substituent.
Claim 2
Dependent Claim
141 words
A photographic material comprising a support bearing a silver halide emulsion layer sensitized with a dye of the formula: ##STR7## wherein Y is S or Se, L 1 , L 2 , L 3 , L 4 and L 5 are each independently substituted or unsubstituted methine groups, A is N--R 3 or O, B is N--R 4 when A is O, or N--R 4 , S, or O when A is N--R 3 , R 1 and R 2 are each a substituted or unsubstituted alkyl or a substituted or unsubstituted aryl group, R 5 is an alkyl group of 1-4 carbon atoms, n is 0, 1, or 2, and X is a counterion, and wherein at least two of R 1 , R 2 , R 3 and R 4 are substituted with an acid or acid salt substituent.
Claim 3
Dependent Claim
12 words
A photographic material as claimed in claim 1 wherein n is O.
Claim 4
Dependent Claim
32 words
A photographic material as claimed in claim 1 wherein at least two of R 1 , R 2 , R 3 , and R 4 are a sulphoalkyl, sulphatoalkyl or carboxyalkyl group.
Claim 5
Dependent Claim
21 words
A photographic material as claimed in claim 1 wherein R 1 and R 2 are sulphoalkyl groups containing 2-4 carbon atoms.
Claim 6
Dependent Claim
26 words
A photographic material as claimed in claim 1 wherein L 1 , L 2 , L 3 , and L 4 are all unsubstituted methine groups.
Claim 7
Dependent Claim
19 words
A photographic material as claimed in claim 1 wherein the dye is selected from the group consisting of: ##STR8##
Claim 8
Dependent Claim
20 words
A photographic material as claimed in any of claims 1-6, further comprising a fluorescent brightening agent in a layer thereof.
Claim 9
Dependent Claim
21 words
A photographic material as claimed in claim 7 wherein the brightening agent is in the layer most distant from the support.
Claim 10
Dependent Claim
15 words
A photographic material as claimed in claim 8 wherein the brightening agent is water insoluble.
Claim 11
Dependent Claim
30 words
A photographic material as claimed in claim 9 in which the fluorescent brightening agent is imbibed on particles of a polymer latex or dissolved in droplets of a coupler solvent.
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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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |