US2955939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holopolar cyanine dyes and photographic emulsions containing them
Assignee: Eastman Kodak Co
•
Filing: 1956-09-13
•
Granted: 1960-10-11
•
Expires: 1976-09-13
Abstract
No abstract record available.
Inventors
- 👤 Leslie G S Brooker
- 👤 Frank L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:38
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0066; C09B23/10; C09B23/12; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/127; G03C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH A CYANINE DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING TWO GENERAL FORMULA:
Claim 2
Dependent Claim
20 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH A CYANINE DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING TWO GENERAL FORMULA:
References Cited (Backward Citations)
US2395879A
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US2191810A
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GB483045A
Cited
US2474426A
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US2450390A
Cited
US2471996A
Cited
US2505496A
Cited
US2739964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |