Patent US2928735A successfully refreshed from Google Patents.
US2928735A
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Photographic emulsions containing an antifoggant and antiplumming agent
Assignee: Eastman Kodak Co
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Filing: 1958-11-05
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Granted: 1960-03-15
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Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Barbier Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; Y; Y10; Y10S; Y10S430/00; Y10S430/166
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING 4-METHYL-7-DIETHYLAMINOCOUMARIN AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1'':2''-DIHYDROQUINOLINO-1'':2'':4:5-TRIAZOLE-(1:2:4)-3-THIOL AND A WATER-SOLUBLE SALT OF 1'':2''-DIHYDROQUINOLINO-1'':2'':4:5-TRAZOLE(1:2:4)3-THIOL.
Claim 2
Dependent Claim
23 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING 4-METHYL-7-DIETHYLAMINOCOUMARIN AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1'':2''-DIHYDROQUINOLINO-1'':2'':4:5-TRIAZOLE-(1:2:4)-3-THIOL AND A WATER-SOLUBLE SALT OF 1'':2''-DIHYDROQUINOLINO-1'':2'':4:5-TRAZOLE(1:2:4)3-THIOL.
References Cited (Backward Citations)
US2649375A
Cited
US2887378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |