US3725067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsion containing 1-h-pyrazolo(3,2-c)-s-triazole color couplers
Assignee: Eastman Kodak Co
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Filing: 1971-01-15
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Granted: 1973-04-03
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Expires: 1991-01-15
Abstract
Abstract 1-H-PYRAZOLO(382-C)-S-TRIAZOLES HAVING UTILITY AS PHOTOGRAPHIC COLOR COUPLERS POSSESSING GOOD COUPLING ACTIVITY AND FORMING DYES OF GOOD SPECTRAL ABSORPTION CHARACTERISTICS AND ALSO UTILITY AS PRECURSORS IN THE FORMATION OF VARIOUS METHINE SENSITIZING DYES.
Inventors
- 👤 J Bailey
- 👤 E Knott
- 👤 P Marr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:08
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C09; C09B; C09B23/00; C09B23/0091; C09B23/02; C09B23/04; C09B23/06; C09B23/08; C09B23/083; C09B23/10; C09B23/105; C09B23/107; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/76; G03C1/825; G03C1/83; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30529; G03C7/32; G03C7/36; G03C7/38; G03C7/381; G03C7/382; G03C7/3825; G03C7/3835; G03C7/384
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |