US3583870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsions containing a bipyridinium salt and a dye
Assignee: Eastman Kodak Co
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Filing: 1968-11-15
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Granted: 1971-06-08
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Expires: 1988-11-15
Abstract
Abstract DIRECT POSITIVE EMULSIONS ARE SPECTRALLY SENSITIZED WITH A SENSITIZING METHINE OR AZACYANINE DYE AND A BIPYRIDINIUM SALT.
Inventors
- 👤 Paul B Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; G03C1/06; G03C1/08; G03C1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |