US2465149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrazolyl disulfides as stabilizing agents for silver-halide emulsions
Assignee: GAF Chemicals Corp
•
Filing: 1946-04-25
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Granted: 1949-03-22
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Expires: 1966-04-25
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
- 👤 Robert H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678832A
Cited
GB305143A
Cited
US2066099A
Cited
US1962133A
Cited
US2124159A
Cited
FR792665A
Cited
US2403927A
Cited
US2385762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |