Patent US3705809A successfully refreshed from Google Patents.
US3705809A
Expired / Lapsed
US
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Silver halide supersensitized photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1970-10-20
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Granted: 1972-12-12
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Expires: 1990-10-20
Abstract
Abstract A SLVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING A COMBINATION OF SENSITIZING DYES OF THE FORMULAE: 1-(R1-OOC-),3,4-(-N(+)(-R2)=C(-CH=C(-R4)-CH=C<(-Z2-(3-W1, 4-W2-1,2-PHENYLENE)-N(-R3)-))-Z1-)BENZENE (X(-))N AND 1-W3,3,4-(-N(+)(-R5)=C(-CH=C(-R7)-CH=C<(-Z4-(4-W4-1,2- PHENYLENE-N(-R6)-))-Z3-)BENZENE (X(-))N SPECIFIC COMPOUNDS ARE DISCLOSED HEREINAFTER.
Inventors
- 👤 Yoshiyuki Nakazawa
- 👤 Yashuharu Nakamura
- 👤 Haruo Takei
- 👤 Akira Sato
- 👤 Tadashi Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:03
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |