US3629274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Merocyanine dyes and photographic materials prepared therewith
Assignee: Eastman Kodak Co
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Filing: 1969-06-11
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Granted: 1971-12-21
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Expires: 1989-06-11
Abstract
Abstract CERTAIN MEROCYANINE DYES DERIVED FROM CYANOMETHYL SULFONES ARE USEFUL AS FILTER DYES AND AS SPECTRAL SENSITIZERS IN LIGHT-SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSIONS. 2-(3-CYANO-3-DODECYLSULFONYLALLYLIDENE)-3-ETHYLTHIAZOLIDINE AND 2-(3-CYANO-3-DODECYLSULFONYLALLYLIDENE)-3-(3SULFOPROPYL)THIAZOLIDINE, POTASSIUM SALT ARE ILLUSTRATIVE OF THE NEW MEROCYANINE DYES.
Inventors
- 👤 Gene L Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:31
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/44; G03C8/48; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/22; G03C1/76; G03C1/825; G03C1/83; G03C1/832; G03C5/00; G03C5/26; G03C5/40; G03C5/48
Claims Analysis
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References Cited (Backward Citations)
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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) | 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 |