US3788859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine grain silver halide photographic emulsion containing hemicyanine sensitizing dye
Assignee: Fujifilm Holdings Corp
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Filing: 1971-10-07
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Granted: 1974-01-29
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Expires: 1991-10-07
Abstract
Abstract A HEMICYANINE DYE IS USED TO SPECTRALLY SENSITIZE SILVER HALIDE PHOTOGRAPHIC EMULSIONS TO PRODUCE EMULSIONS HAVING HIGH PHOTOSENSITIVITY IN THE REGION OF WAVELENGTHS OF ABSORPTION INTRINSIC TO SILVER HALIDE AND IN THE REGION OF WAVELE WAVELENGTHS OF THE DYE.
Inventors
- 👤 T Sueyoshi
- 👤 A Sato
- 👤 Y Nakazawa
- 👤 Y Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |