US3782957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fogged,direct-positive silver halide emulsion layer containing a cyanine dye and a compound containing a metal of group viii of the periodic table
Assignee: Fujifilm Holdings Corp
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Filing: 1971-12-29
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Granted: 1974-01-01
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Expires: 1991-12-29
Abstract
Abstract A DIRECT REVERSAL SILVER HALIDE PHOTOGRAPHIC MATERIAL SUITABLE FOR USE IN A COPYING PROCESS ULITIZING A MERCURY OR FLUORENSANT LAMP IS PROVIDED BY INCLUDING A COMPOUND OF A METAL OF GROUP VIII OF THE PERIODIC TABLE AND A SPECIFIC CYANINE DYE IN A SILVER HALIDE EMULSION LAYER. THE FOG NUCLEI FORMED IN THE SILVER HALIDE EMULSION LAYER BEFOREHAND HAVE RESISTANCE TO INDOOR ILUMINATION, AND THE RESULTANT PHOTOGRAPHIC MATERIAL CAN BE HANDLED UNDER INDOOR ILLUMINATION WITHOUT CAUSING THE BREAKAGE OF THE FOG NUCLEI, AND GIVE IMAGES OF GOOD CONTRAST.
Inventors
- 👤 K Ohkubo
- 👤 T Masuda
- 👤 K Shiba
- 👤 A Ogawa
- 👤 M Hinata
- 👤 A Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |