US3079255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes of developing exposed silver halide photographic emulsions and compositions for use therein
Assignee: Agfa Gevaert NV
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Filing: 1959-11-06
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Granted: 1963-02-26
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Expires: 1979-11-06
Abstract
No abstract record available.
Inventors
- 👤 Wahl Ottmar
- 👤 Menzel Karl-Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:03
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035; G03C5/305; G03C7/00; G03C7/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
34 words
AN AQUEOUS ALKALINE COLOR DEVELOPER CONSISTING ESSENTIALLY OF A SOLUTION OF A 4-AMINO-PYRAZOLINO- 1.5:1''.2''!BENZIMIDAZOLE AND A COLOR-COUPLER CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINE DEVELOPER TO FORM A DYESTUFF.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |