Patent US3666476A successfully refreshed from Google Patents.
US3666476A
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Thio-substituted(2.2.1)bicyclic compounds as antifoggants for silver halide emulsions
Assignee: Eastman Kodak Co
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Filing: 1969-11-28
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Granted: 1972-05-30
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Expires: 1989-11-28
Abstract
Abstract PHOTOGRAPHIC COMPOSITIONS CONTAINING THIO-SUBSTITUTED POLYCYCLIC COMPOUNDS. IN ONE ASPECT, THE THIO-SUBSTITUTED COMPOUNDS CONTAINING A THIO-SUBSTITUTED (2.2.1) BICYCLIC MOIETY ARE GOOD ANTIFOGGANTS IN PHOTOGRAPHIC SILVER HALIDE COMPOSITIONS.
Inventors
- 👤 John Robert Dann
- 👤 William Frank Fowler Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G73/00; C08G73/06; C08G73/10; C08G73/1057; C08G73/1064; G03C1/04
Claims Analysis
Total Claims: 0
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |