Patent US3704154A successfully refreshed from Google Patents.
US3704154A
Expired / Lapsed
US
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Process for producing photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1971-02-18
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Granted: 1972-11-28
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Expires: 1991-02-18
Abstract
Abstract A PROCESS FOR PRODUCING PHOTOGRAPHIC MATERIALS COMPRISING CONTACTING A BI-AXIALLY STRETCHED POLYSTYRENE SUPPORT WITH A LIQUID CONTAINING AT LEAST A SOLVENT OR SWELLING AGENT FOR SAID POLYSTYRENE AND GELATIN DISPERSED THEREIN, CONTACTING THE SUPPORT WITH A NON-SOLVENT FOR SAID POLYSTYRENE TO PREPARE A WHITE OPAQUE POLYSTYRENE SUPPORT HAVING A HYDROPHILIC SURFACE, AND APPLYING AN EMULSION OR SUSPENSION CONTAINING GELATIN TO SAID SUPPORT, IS DISCLOSED.
Inventors
- 👤 Sumitaka Tatsuta
- 👤 Wataru Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; B; B29; B29C; B29C71/00; B29C71/0009; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/91; G03C8/00; G03C8/42; G03C8/52; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S430/00; Y10S430/155
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |