US3853565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic supersensitising dye combination
Assignee: Ilford Imaging UK Ltd
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Filing: 1973-04-18
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Granted: 1974-12-10
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Expires: 1993-04-18
Abstract
Abstract The present invention relates to a photographic silver halide emulsion or emulsion layer which comprises a supersensitising combination of (1) a bis-benzothiazole or other bis-azole trimethincyanine dye and (2) a trifluormethylbenzimidazolebenzoxazole trimethincyanine dye.
Inventors
- 👤 E Thurston
- 👤 J Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
A PHOTOGRAPHIC SILVER HALIDE MATERIAL WHICH COMPRISES A SUPER-SENSISTING COMBINATION WHICH CONSISTS ESSENTIALLY OF A SENSISTING DYE OF THE FORMULA
Claim 2
Dependent Claim
20 words
A PHOTOGRAPHIC SILVER HALIDE MATERIAL WHICH COMPRISES A SUPER-SENSISTING COMBINATION WHICH CONSISTS ESSENTIALLY OF A SENSISTING DYE OF THE FORMULA
Claim 3
Dependent Claim
33 words
A photographic silver halide material according to claim 1 wherein in the dyes of the second formula set forth in claim 1 R12 is a hydrogen atom and R13 is a phenyl group.
Claim 4
Dependent Claim
24 words
A photographic silver halide material according to claim 2 which comprises a super-sensitising combination which consists essentially of a sensitising dye of the formula
Claim 5
Dependent Claim
38 words
A photographic silver halide material according to claim 1 which contains from 0.01 to 0.5 of each sensitising dye of the two formulae set forth in claim 1 per 1.5 g moles of silver present in the emulsion.
Claim 6
Dependent Claim
16 words
A photographic silver halide emulsion layer which comprises a super-sensitising combination as defined in claim 1.
Claim 7
Dependent Claim
35 words
A photographic silver halide emulsion which comprises a supersensitising combination as defined in claim 1, which combination consists essentially of one of the sensitising dyes selected from the group consisting of dyes of the formulae
References Cited (Backward Citations)
US3348949A
Cited
US3702251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |