Patent US2694638A successfully refreshed from Google Patents.
US2694638A
Expired / Lapsed
US
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Supersensitization of carbocyanine dyes with hemicyanine bases
Assignee: Eastman Kodak Co
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Filing: 1953-08-13
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Granted: 1954-11-16
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Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH A SUPERSENSITIZING COMBINATION OF (1) AT LEAST ONE CARBOCYANINE DYE SELECTED FROM THE GROUP CONSISTING OF 2,2''-CARBOCYAMINE DYES, 9-ALKYLTHIA-2''-CARBOCYAMINE DYES WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS AND A MESO-SUBSTITUTED DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
51 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH A SUPERSENSITIZING COMBINATION OF (1) AT LEAST ONE CARBOCYANINE DYE SELECTED FROM THE GROUP CONSISTING OF 2,2''-CARBOCYAMINE DYES, 9-ALKYLTHIA-2''-CARBOCYAMINE DYES WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 4 CARBON ATOMS AND A MESO-SUBSTITUTED DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |