US3137578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing 2-heterocyclic benzimidazole antifoggants
Assignee: Eastman Kodak Co
•
Filing: 1962-02-07
•
Granted: 1964-06-16
•
Expires: 1982-02-07
Abstract
No abstract record available.
Inventors
- 👤 Selms Roy C De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:58
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A SUBSTITUTED BENZIMIDAZOLE ANTIFOGGANT, SAID BENZIMIDAZOLE HAVING SUBSTITUTED IN THE 2-POSITION A HETEROCYCLIC RADICAL HAVING THE FORMULA
Claim 2
Dependent Claim
23 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A SUBSTITUTED BENZIMIDAZOLE ANTIFOGGANT, SAID BENZIMIDAZOLE HAVING SUBSTITUTED IN THE 2-POSITION A HETEROCYCLIC RADICAL HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |