US2652329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color couplers containing isophthalic acid radicals
Assignee: Eastman Kodak Co
•
Filing: 1952-07-31
•
Granted: 1953-09-15
•
Expires: 1972-07-31
Abstract
No abstract record available.
Inventors
- 👤 Fred C Mccrossen
- 👤 Stanley M Parmerter
- 👤 Weissberger Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A GELATINO-SILVER HALIDE EMULSION LAYER CONTAINING A COUPLER COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
12 words
A GELATINO-SILVER HALIDE EMULSION LAYER CONTAINING A COUPLER COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |