US3834928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1971-12-28
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Granted: 1974-09-10
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Expires: 1991-12-28
Abstract
Abstract A PROCESS FOR PRODUCTION OF A PHOTOGRAPHIC MATERIAL WHICH COMPRISES THE STEPS OF FIRST UNDERCOATING AN AQUEOUS GELATIN SOLLUTION OR A DISPERSION OF GELATIN IN AN ORGANIC SOLVENT ONTO A STRECHED HIGH MOLECULAR WEIGHT FILM HAVING ROUGHENED SURFACE, THEN HEAT-TREATING THE RESULTANT FILM AT A TEMPERATURE IN THE RANGE OF FROM TG-40* C. TO TG+40*C., THEREAFTER APPLYING TO THE FILM AN EMULSION OR SUSPENSION CONTAINING GELAATIN AS A BINDER. (TG BEING A GLASS TRANSITION TEMPERATURE OF THE FILM-COMPOSING RESIN USED.
Inventors
- 👤 S Tatsuta
- 👤 W Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/795
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |