Patent US3756818A successfully refreshed from Google Patents.
US3756818A
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US
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Process for forming dye images
Assignee: Fujifilm Holdings Corp
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Filing: 1971-04-30
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Granted: 1973-09-04
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Expires: 1991-04-30
Abstract
Abstract A PROCESS FOR FORMING DYE IMAGES WHEREBY A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER IS SUBJECTED TO RADIATION SO AS TO CREATE CENTERS FOR DEVELOPING WITHIN THE SILVER HALIDE GRAINS, SUBJECTING THE EXPOSED SILVER HALIDE TO A COMPOUND RESORCINOL, M-AMINOPHENOL, NAPHTHOL OR DERIVATIVES THEREOF AND TO A POLYMERIZABLE VINYL COMPOUND CAPABLE OF BEING ELECTRICALLY CHARGED BY IONIZATION OR BY THE ADDITION OF A HYDROGEN ION, POLYMERIZING THE VINYL COMPOUND WITH SAID ACTIVATED SILVER HALIDE GRAINS AND DYEING THE RESULTING IONIZABLE POLYMER WITH A DYE HAVING AN ELECTRIC CHARGE OPPOSITE TO THE POLYMER.
Inventors
- 👤 Y Hayakawa
- 👤 M Satomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:49
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/0285
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |