US3982944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifoggant dispersion for color photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1975-02-06
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Granted: 1976-09-28
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Expires: 1995-02-06
Abstract
Abstract A stable emulsified dispersion for preventing the occurrence of color fog of silver halide color photographic materials comprising a dispersion prepared by dissolving 2,5-bis(1',1'-dimethylbutyl)hydroquinone and another aliphatic hydrocarbon group-substituted hydroquinone in a high boiling organic solvent and dispersing the solution in a hydrophilic colloid medium.
Inventors
- 👤 Reiichi Ohi
- 👤 Takeo Shimada
- 👤 Yasushi Oishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:46
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216; C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |