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Patent US3628964A successfully refreshed from Google Patents.
US3628964A
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Photographic supersensitized silver halide emulsions
Assignee: Fujifilm Holdings Corp
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Filing: 1968-07-17
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Granted: 1971-12-21
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Expires: 1988-07-17
Abstract
Abstract A photographic silver halide emulsion containing at least one carbocyanine dye represented by the general formula: AND AT LEAST ONE CARBOCYANINE DYE REPRESENTED BY THE GENERAL FORMULA: The various individual moieties indicated in the above identified structures are defined in the specification.
Inventors
- 👤 Keisuke Shiba
- 👤 Akira Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29; C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; C09B23/10; C09B23/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A photographic silver halide emulsion as claimed in claim 1 wherein the substituted alkyl group is selected from the class consisting of a 2-hydroxyethyl, a 2-methoxyethyl, a carboxymethyl, a 2-carboxyethyl, a 3-carboxypropyl, a 4-carboxybutyl, a 2-sulfoethyl, a 3-sulfopropyl, a carboethoxyethyl, a phenyl methyl and a vinylmethyl group.
Claim 2
Dependent Claim
17 words
A photographic silver halide emulsion containing at least one carbocyanine dye selected from the group consisting of:
References Cited (Backward Citations)
US2289300A
Cited
US3364031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |