US2596926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of azine dye images
Assignee: GAF Chemicals Corp
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Filing: 1949-12-16
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Granted: 1952-05-13
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Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert C Gunther
- 👤 Tulagin Vsevolod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:32
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN THE PROCESS OF PRODUCING BRILLIANT AZINE DYE IMAGES THROUGH IMPROVED COLR RENDITION WHICH COMPRISES DEVELOPING AN EXPOSED SILVER HALIDE EMULSION IN THE PRESENCE OF A COLOR FORMER CAPABLE OF REACTING WITH THE OXIDATION PRODUCTS OF A 2,4-DIAMINOANILINE TO YIELD AN AZINE DYE IMAGE WITH A DEVELOPING AGENT CONTAINING A 2,4DIAMINO ANILINE AND A SMALL QUANTITY OF A PYRIDINE DERIVATIVE SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
71 words
IN THE PROCESS OF PRODUCING BRILLIANT AZINE DYE IMAGES THROUGH IMPROVED COLR RENDITION WHICH COMPRISES DEVELOPING AN EXPOSED SILVER HALIDE EMULSION IN THE PRESENCE OF A COLOR FORMER CAPABLE OF REACTING WITH THE OXIDATION PRODUCTS OF A 2,4-DIAMINOANILINE TO YIELD AN AZINE DYE IMAGE WITH A DEVELOPING AGENT CONTAINING A 2,4DIAMINO ANILINE AND A SMALL QUANTITY OF A PYRIDINE DERIVATIVE SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
US2486440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |