US2533472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsymmetrical oxonol filter and antihalation dyes
Assignee: Eastman Kodak Co
•
Filing: 1947-01-17
•
Granted: 1950-12-12
•
Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 Grafton H Keyes
- 👤 Leslie G S Brooker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON AT LEAST ONE SENSITIVE SILVER HALIDE EMULSION LAYER AND A LIGHT-ABSORBING LAYER CONTAINING A DYE HAVING THE FORMULA:
Claim 2
Dependent Claim
26 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON AT LEAST ONE SENSITIVE SILVER HALIDE EMULSION LAYER AND A LIGHT-ABSORBING LAYER CONTAINING A DYE HAVING THE FORMULA:
References Cited (Backward Citations)
US2186608A
Cited
US2274782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |