US4503137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image-forming process
Assignee: Fujifilm Holdings Corp
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Filing: 1984-02-16
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Granted: 1985-03-05
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Expires: 2004-02-16
Abstract
Abstract A process for imagewise forming a mobile dye, which comprises heating, after or simultaneously with image exposure, a light-sensitive material having on a support a photosensitive silver halide, a binder, and an immobile dye-providing material which releases a dye by heating, and which is reductive and by heating becomes a material not releasing a dye by causing an oxidation with the photosensitive silver halide at a portion where a silver halide is reduced to form silver.
Inventors
- 👤 Satoru Sawada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:22
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/40; G03C8/4013; G03C1/00; G03C1/494; G03C1/498; G03C7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3980479A
Cited
US4139389A
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US4139379A
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US4232107A
Cited
US4430415A
Cited
US4439513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |