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US3582348A
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Silver halide emulsions containing merocyanine dyes having a triazolo or tetrazolo (1,5-a) pyrimidin-7(6h)-one nucleus
Assignee: Eastman Kodak Co
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Filing: 1968-05-28
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Granted: 1971-06-01
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Expires: 1988-05-28
Abstract
Abstract MEROCYANINE DYES ARE PROVIDED WHICH FEATURE A TRIAZOLO- OR A TETRAZOLO (1,5-A) PYRIMIDIN 7(6H)-ONE NUCLEUS. LIGHT SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSIONS CONTAINING SUCH DYES ARE ALSO PROVIDED.
Inventors
- 👤 Donald W Heseltine
- 👤 Carl H Eldredge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; C; C09; C09B; C09B23/00; C09B23/10; C09B23/105
Claims Analysis
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |