US3671260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic thioether or selenoether silver complexes as emulsion sensitizers
Assignee: Eastman Kodak Co
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Filing: 1971-01-14
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Granted: 1972-06-20
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Expires: 1991-01-14
Abstract
Abstract PHOTOGRAPHIC SILVER BROMOIODIDE EMULSIONS ARE SPECTRALLY SENSITIZED BY ADDING THERETO A MIXTURE COMPRISING A PHOTOGRAPHIC SPECTRAL SENSITIZING DYE AND A COMPLEX OF SILVER WITH AN ORGANIC THIOETHER OR AN ORGANIC SELENOETHER. ADDITION OF THE SILVER COMPLEX REDUCES THE BLUE DESENSITIZATION CAUSED BY THE SENSITIZING DYE AND THUS INCREASES SPECTRAL SENSITIZATION EFFICIENCY, INCUBATION STABILITY OF THE EMULSION IS ALSO ENHANCED.
Inventors
- 👤 Edwin N Oftedahl
- 👤 Thomas J Huttemann Jr
- 👤 Charles A Goffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/09; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 0
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |