US3445235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rhodium and iridium salts as anti-kinking agent in direct positive silver halide emulsions
Assignee: EIDP Inc
•
Filing: 1965-07-15
•
Granted: 1969-05-20
•
Expires: 1985-07-15
Abstract
No abstract record available.
Inventors
- 👤 Cortland R Burt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:39
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/315; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2717833A
Cited
US3361564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |