US2865752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-absorbing anthraquinone dyes for photographic emulsions
Assignee: Eastman Kodak Co
•
Filing: 1955-10-17
•
Granted: 1958-12-23
•
Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Vernon I Saunders
- 👤 Charles V Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AN ANTHRAQUINONE DYE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AN ANTHRAQUINONE DYE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2289397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |