US2694635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Couplers for color photography
Assignee: Eastman Kodak Co
•
Filing: 1951-12-05
•
Granted: 1954-11-16
•
Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Salminen Ilmari
- 👤 Weissberger Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:49
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212; Y; Y10; Y10S; Y10S534/00; Y10S534/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PHOTOGRAPHIC EMULSION FOR FORMING COLORED IMAGES COMPRISING A SILVER HALIDE EMULSION HAVING THE INCORPORATED THEREIN A COUPLER COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
22 words
A PHOTOGRAPHIC EMULSION FOR FORMING COLORED IMAGES COMPRISING A SILVER HALIDE EMULSION HAVING THE INCORPORATED THEREIN A COUPLER COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2179239A
Cited
US2186717A
Cited
US2186849A
Cited
US2369489A
Cited
FR890863A
Cited
US2511231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |