Patent US1900818A successfully refreshed from Google Patents.
Patent US2919985A successfully refreshed from Google Patents.
US2919985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifoggants and stabilizers for photographic silver halide emulsions
Assignee: GAF Chemicals Corp
•
Filing: 1958-08-15
•
Granted: 1960-01-05
•
Expires: 1978-08-15
Abstract
No abstract record available.
Inventors
- 👤 Dersch Fritz
- 👤 Angelus Millet R De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
THE PROCESS OF MINIMIZING AND PREVENTING FOR IN LIGHT-SENSITIVE SILVER HALIDE MATERIALS COMPRISING A BASE HAVING A LIGHT-SENSITIVE SILVER HALIDE EMULSION THEREON WHICH COMPRISES EXPOSING SAID EMULSION AND DEVELOPMENT THE SAME IN SILVER HALIDE DEVELOPER IN THE PRESENCE OF AN ANTIFOGGANT AND STABILIZER OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2743181A
Cited
US2819965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |