Patent US3002836A successfully refreshed from Google Patents.
US3002836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyan color former for color photography
Assignee: Eastman Kodak Co
•
Filing: 1959-04-09
•
Granted: 1961-10-03
•
Expires: 1979-04-09
Abstract
No abstract record available.
Inventors
- 👤 Paul W Vittum
- 👤 Weissberger Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:55
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A CYAN-FORMING PHOTOGRAPHIC DEVELOPER COMPRISING A PHENYLENEDIAMINE DEVELOPING AGENT HAVING AT LEAST ONE PRIMARY AMINO GROUP AND THE COUPLER COMPOUND 2-(OACETAMIDO -B-PHENYLETHYL)-1-HYDROXYNAPHTHAMIDE HAVING THE FORMULA:
Claim 2
Dependent Claim
25 words
A CYAN-FORMING PHOTOGRAPHIC DEVELOPER COMPRISING A PHENYLENEDIAMINE DEVELOPING AGENT HAVING AT LEAST ONE PRIMARY AMINO GROUP AND THE COUPLER COMPOUND 2-(OACETAMIDO -B-PHENYLETHYL)-1-HYDROXYNAPHTHAMIDE HAVING THE FORMULA:
References Cited (Backward Citations)
US2589004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |