US2527583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Merocyanine filter and backing dyes
Assignee: Eastman Kodak Co
•
Filing: 1946-02-07
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Granted: 1950-10-31
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Expires: 1966-02-07
Abstract
No abstract record available.
Inventors
- 👤 Hedwiga R Silberstein
- 👤 Burt H Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832; C; C09; C09B; C09B23/00; C09B23/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SENSITIVE SILVER HALIDE EMULSION LAYER AND A LIGHTABSORBING WATER-PERMEABLE COLLOID LAYER CONTAINING A DYE HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
23 words
A PHOTOGRAPHIC ELEMENT COMPRISING A SENSITIVE SILVER HALIDE EMULSION LAYER AND A LIGHTABSORBING WATER-PERMEABLE COLLOID LAYER CONTAINING A DYE HAVING 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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |