US2947631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multicontrast photographic emulsions containing cyanine dyes
Assignee: Eastman Kodak Co
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Filing: 1958-03-03
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Granted: 1960-08-02
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:46
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: 1
Claim 1
Independent Claim
45 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION SENSITIZED WITH FROM ABOUT 5 TO 300 MG./MOLE, BASED ON THE AMOUNT OF SILVER HALIDE, OF A SPECTRAL SENSITIZING DYE SELECTED FROM THE GROUP CONSISTING OF (1) A NEUTRAL CYANINE 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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |