US3708299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic developing method
Assignee: Fujifilm Holdings Corp
•
Filing: 1970-10-08
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Granted: 1973-01-02
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Expires: 1990-10-08
Abstract
Abstract A METHOD AND COMPOSITION FOR PROCESSING A SILVER HALIDE BLACK AND WHITE PHOTOGRAPHIC MATERIAL WHEREIN THE SILVER HALIDE GRAINS ARE LESS THAN 0.3 MICRON WHICH COMPRISES DEVELOPING THE PHOTOGRAPHIC MATERIAL WITH A DEVELOPING SOLUTION HYDROQUINONE (SUBSTITUTED OR UNSUBSTITUTED) AS THE MAIN DEVELOPING AGENT AND IMIDAZOLE IN A MINOR AMOUNT.
Inventors
- 👤 I Shimamura
- 👤 Y Iijima
- 👤 H Iwano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; Y; Y10; Y10S; Y10S430/00; Y10S430/135; Y10S430/162
Claims Analysis
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |