US2944901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicontrast photographic emulsions
Assignee: Eastman Kodak Co
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Filing: 1957-01-18
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Granted: 1960-07-12
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH A SPECTRAL SENSITIZING DYE SELECTED FROM THE GROUP CONSISTING OF (1) AN ACID MEROCYANINE DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
31 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH A SPECTRAL SENSITIZING DYE SELECTED FROM THE GROUP CONSISTING OF (1) AN ACID MEROCYANINE DYE SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL 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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |