US3692555A
Expired / Lapsed
US
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Photographic film support having an antihalation layer
Assignee: Fujifilm Holdings Corp
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Filing: 1971-04-07
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Granted: 1972-09-19
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Expires: 1991-04-07
Abstract
Abstract A PHOTOGRAPHIC FILM SUPPORT COMPRISING A FILM SUPPORT HAVING FORMED THEREON AN ANTIHALATION LAYER CONTAINING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF A HYDROXYALKYLALKYL CELLULOSE HEXAHYDROPHTHALATE AND A HYDROXYALKYLALKYL CELLULOSE TETRAHYDROPHTHALATE, WHEREIN SAID ALKYL GROUP HAS CARBON RANGE OF FROM 1 TO 4 CARBON ATOMS AND INCLUDES TWO OR MORRE ALKYL GROUP.
Inventors
- 👤 Masazumi Aono
- 👤 Ikuo Fuutagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:08
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31844; Y10T428/31848
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |