Patent US1933636A successfully refreshed from Google Patents.
Patent US2685509A successfully refreshed from Google Patents.
US2685509A
Expired / Lapsed
US
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Optically sensitized photographic emulsion
Assignee: Eastman Kodak Co
•
Filing: 1951-10-05
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Granted: 1954-08-03
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Expires: 1971-10-05
Abstract
No abstract record available.
Inventors
- 👤 Doyle Frank Peter
- 👤 Edwards Harry Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:29
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AS A SENSITIZER A DYESTUFF HAVING THE FORMULA:
Claim 2
Dependent Claim
14 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AS A SENSITIZER A DYESTUFF HAVING THE FORMULA:
References Cited (Backward Citations)
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Cited
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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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |