US3058827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialdehyde starch as gelatin hardener
Assignee: Eastman Kodak Co
•
Filing: 1960-02-09
•
Granted: 1962-10-16
•
Expires: 1980-02-09
Abstract
No abstract record available.
Inventors
- 👤 James L Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/303
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A GELATIN-SILVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING AS THE HARDENER THEREIN A DIALDEHYDE STARCH WHICH HAS BEEN TREATED WITH ALKILI METAL HYDROXIDE AT A PH NO MORE THAN 7.
References Cited (Backward Citations)
US1870354A
Cited
US2172300A
Cited
US2606188A
Cited
US2783283A
Cited
US2880236A
Cited
US2894945A
Cited
US2929811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |