US2537460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of azine dye images by means of a developer containing two n-substituted-diamino-meta-nilic acids
Assignee: GAF Chemicals Corp
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Filing: 1948-07-15
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Granted: 1951-01-09
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Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 Robert C Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE PROCESS OF PRODUCING AZINE DYE IMAGES WHICH COMPRISES EXPOSING A SILVER HALIDE EMULSION AND COLOR DEVELOPING THE SAME IN THE PRESSENCE OF A COLOR FORMER CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF A PRIMARY AROMATIC AMINO DEVELOPER TO FORM A DYE IMAGE, WITH A DEVELOPER MIXTURE CONTAINING TWO DIFFERENT 2.4- DIAMINO ANILINES SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
65 words
THE PROCESS OF PRODUCING AZINE DYE IMAGES WHICH COMPRISES EXPOSING A SILVER HALIDE EMULSION AND COLOR DEVELOPING THE SAME IN THE PRESSENCE OF A COLOR FORMER CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF A PRIMARY AROMATIC AMINO DEVELOPER TO FORM A DYE IMAGE, WITH A DEVELOPER MIXTURE CONTAINING TWO DIFFERENT 2.4- DIAMINO ANILINES SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING 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) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |