Patent US2569906A successfully refreshed from Google Patents.
US2569906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive emulsions containing color formers capable of yielding nonmigratory azine dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1947-12-23
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Granted: 1951-10-02
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Expires: 1967-12-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert C Starke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:28
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3244
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CAPABLE OF YIELDING AZINE DYESTUFF IMAGES UPON EXPOSURE AND COLOR DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPER CONTAINING AS THE COLOR FORMER A COMPOUND OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
33 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CAPABLE OF YIELDING AZINE DYESTUFF IMAGES UPON EXPOSURE AND COLOR DEVELOPMENT WITH A PRIMARY AROMATIC AMINO DEVELOPER CONTAINING AS THE COLOR FORMER A COMPOUND OF THE FOLLOWING 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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |