Patent US4461395A successfully refreshed from Google Patents.
Patent US1759168A successfully refreshed from Google Patents.
Patent US3171740A successfully refreshed from Google Patents.
US3171740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of colored photographic non-transparent or transparent images
Assignee: Agfa Gevaert NV
•
Filing: 1961-02-09
•
Granted: 1965-03-02
•
Expires: 1981-02-09
Abstract
No abstract record available.
Inventors
- 👤 Menzol Karl-Heinz
- 👤 Putter Rolf
- 👤 Wolfrum Gerbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:27
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/381; G03C7/382; G03C7/3825; G03C7/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
IN A PROCESS FOR THE PRODUCTION OF MAGENTA AND CYANCOLORED PHOTOGRAPHIC IMAGES WHICH COMPRISES DEVELOPING AN EXPOSED SILVER HALIDE EMULSION LAYER WITH A COLOR-FORMING DEVELOPER, THE IMPROVEMENT CONSISTING IN DEVELOPING THE EXPOSED SILVER HALIDE EMULSION LAYER IN THE PRESENCE OF A COLOR COUPLER CONSISTING OF PYRAZOLO (1'',5'':3,2) QUINOZOLONE OF THE GROUP CONSISTING OF COMPOUNDS HAVING THE FOLOWING TAUTOMERIC FORMULAE:
Claim 2
Dependent Claim
59 words
IN A PROCESS FOR THE PRODUCTION OF MAGENTA AND CYANCOLORED PHOTOGRAPHIC IMAGES WHICH COMPRISES DEVELOPING AN EXPOSED SILVER HALIDE EMULSION LAYER WITH A COLOR-FORMING DEVELOPER, THE IMPROVEMENT CONSISTING IN DEVELOPING THE EXPOSED SILVER HALIDE EMULSION LAYER IN THE PRESENCE OF A COLOR COUPLER CONSISTING OF PYRAZOLO (1'',5'':3,2) QUINOZOLONE OF THE GROUP CONSISTING OF COMPOUNDS HAVING THE FOLOWING TAUTOMERIC FORMULAE:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |