US2566658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions containing antifogging agents
Assignee: Ilford Imaging UK Ltd
•
Filing: 1949-11-17
•
Granted: 1951-09-04
•
Expires: 1969-11-17
Abstract
No abstract record available.
Inventors
- 👤 Fry Douglas James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:41
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A PHOTOGRAPHIC GELATINO SILVER HALIDE EMULSION CONTAINING A SMALL QUANTITY OF A COMPOUND OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
17 words
A PHOTOGRAPHIC GELATINO SILVER HALIDE EMULSION CONTAINING A SMALL QUANTITY OF A COMPOUND OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2449225A
Cited
US2476536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |