US2507110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color forming photographic development utilizing amino-nu-hydrocarbon substituted beta-amino-acrylamide couplers
Assignee: EIDP Inc
•
Filing: 1946-07-11
•
Granted: 1950-05-09
•
Expires: 1966-07-11
Abstract
No abstract record available.
Inventors
- 👤 Leekley Robert Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING A PRIMARY AROMATIC AMINO DEVELOPING AGENT AND AN AMINONITROGEN-HYDROCARBON-SUBSTITUTED BETA-AMINOACRYLAMIDE.
Claim 2
Dependent Claim
15 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING A PRIMARY AROMATIC AMINO DEVELOPING AGENT AND AN AMINONITROGEN-HYDROCARBON-SUBSTITUTED BETA-AMINOACRYLAMIDE.
References Cited (Backward Citations)
US2325331A
Cited
US2307399A
Cited
US2319426A
Cited
US2282001A
Cited
US2359274A
Cited
US2407210A
Cited
US2407207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |