US2496843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements containing hydroxy heavy metal salts of trinuclear iminol cyanine dyes as filter and antihalation dyes
Assignee: GAF Chemicals Corp
•
Filing: 1948-03-10
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Granted: 1950-02-07
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Expires: 1968-03-10
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Anish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PHOTOGRAPHIC LIGHT-SENSITIVE ELEMENT WHICH COMPRISES A GELATINO SILVER-HALIDE EMULSION AND A FILTER LAYER CONTAINING A HYDROXY HEAVY METAL SALT OF A TRINUCLEAR IMINOL CYANINE DYE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
32 words
A PHOTOGRAPHIC LIGHT-SENSITIVE ELEMENT WHICH COMPRISES A GELATINO SILVER-HALIDE EMULSION AND A FILTER LAYER CONTAINING A HYDROXY HEAVY METAL SALT OF A TRINUCLEAR IMINOL CYANINE DYE CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2050588A
Cited
US2298731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |