US3056674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color formers for producing yellow dye images by color development
Assignee: GAF Chemicals Corp
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Filing: 1961-02-01
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Granted: 1962-10-02
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Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Walter F Hoffstadt
- 👤 Alex P Altavilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
THE PROCESS OF PRODUCING A YELLOW DYESTUFF IMAGE IN A SILVER HALIDE EMULSION WHICH COMPRISES EXPOSING SAID EMULSION TO LIGHT AND DEVELOPING THE SAME WITH A PRIMARY AROMATIC AMINO DEVELOPER IN THE PRESENCE OF A COLOR FORMER FOR YELLOW HAVING THE FOLLOWING STRUCTURAL FORMULA;
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) | 1965-10-01 | 1966-04-02 | 1966-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-01 | 1970-04-02 | 1970-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-01 | 1974-04-02 | 1974-10-02 | $7700.00 | Window Closed / Lapsed |