US2521959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically sensitized photographic silver halide emulsions
Assignee: GAF Chemicals Corp
•
Filing: 1947-08-08
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Granted: 1950-09-12
•
Expires: 1967-08-08
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Anish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PHOTOGRAPHIC GELATINO-SILVER-HALIDE EMULSION WHICH CONTAINS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
19 words
A PHOTOGRAPHIC GELATINO-SILVER-HALIDE EMULSION WHICH CONTAINS A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE GENERAL 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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |