US2536010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of azine dyestuff images
Assignee: GAF Chemicals Corp
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Filing: 1947-07-11
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Granted: 1950-12-26
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Expires: 1967-07-11
Abstract
No abstract record available.
Inventors
- 👤 Willy A Schmidt
- 👤 Joseph A Sprung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:31
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE PROCESS OF PRODUCING AZINE DYESTUFF IMAGES IN A PHOTOGRAPHIC SILVER HALIDE EMULSION WHICH COMPRISES EXPOSING THE EMULSION AND DEVELOPING THE SAME WITH A PRIMARY AROMATIC AMINO DEVELOPER IN THE PRESENCE OF AROMATIC PHENOL CAPABLE OF COUPLING IN THE 4-POSITION AND CONTAINING A SULFONAMIDO GROUP, THE NITROGEN ATOM OF WHICH IS DIRECTLY LINKED TO THE CARBON ATOM IN META-POSITION TO THE PHENOLIC HYDROXYL GROUP.
Claim 2
Dependent Claim
64 words
THE PROCESS OF PRODUCING AZINE DYESTUFF IMAGES IN A PHOTOGRAPHIC SILVER HALIDE EMULSION WHICH COMPRISES EXPOSING THE EMULSION AND DEVELOPING THE SAME WITH A PRIMARY AROMATIC AMINO DEVELOPER IN THE PRESENCE OF AROMATIC PHENOL CAPABLE OF COUPLING IN THE 4-POSITION AND CONTAINING A SULFONAMIDO GROUP, THE NITROGEN ATOM OF WHICH IS DIRECTLY LINKED TO THE CARBON ATOM IN META-POSITION TO THE PHENOLIC HYDROXYL GROUP.
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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |