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Patent US2530349A successfully refreshed from Google Patents.
US2530349A
Expired / Lapsed
US
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Cyan color formers capable of yielding fine grain images
Assignee: GAF Chemicals Corp
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Filing: 1947-04-30
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Granted: 1950-11-14
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Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Winfred C Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:16
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/344
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AS A COLOR FORMER FOR THE CYAN THE COMPOUNDS OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
19 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING AS A COLOR FORMER FOR THE CYAN THE COMPOUNDS OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
FR836144A
Cited
US2186849A
Cited
US2357394A
Cited
US2373821A
Cited
US2353754A
Cited
US2410620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |