US3697275A
Expired / Lapsed
US
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Process for polymerizing vinyl compounds
Assignee: Fujifilm Holdings Corp
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Filing: 1971-04-26
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Granted: 1972-10-10
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Expires: 1991-04-26
Abstract
Abstract A PROCESS FOR POLYMERIZING VINYL MONOMERS. THE INITIATION OF THE POLYMERIZATION IS CAUSED BY INTERMEDIATE COMPOUNDS FORMED DURING THE DEVELOPMENT OF PHOTOGRAPHIC SILVER HALIDE EMULSIONS BY CERTAIN PHENOLIC REDUCING AGENTS IN THE PRESENCE OF VINYL MONOMERS. THE SUITABLE PHENOLIC COMPOUNDS ARE RESORCINOL, M-AMINOPHENOL AND THERI DERIVATIVES. THUS, A PHOTOGRAPHIC IMAGE CONSISTING OF POLYMERIC MATERIAL CAN BE FORMED CORRESPONDING TO THE PHOTOGRAPHIC LATENT IMAGE PRODUCED IN THE EMULSION. THE POLYMERIZATION IS PROMOTED BY THE PRESENCE OF SULFITE IRON.
Inventors
- 👤 Yoshihide Hayakawa
- 👤 Masato Satomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:25
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/0285; C; C08; C08F; C08F2/00; C08F2/46
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |