US3745013A
Expired / Lapsed
US
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Method for making hardened gelatin images
Assignee: Fujifilm Holdings Corp
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Filing: 1971-10-18
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Granted: 1973-07-10
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Expires: 1991-10-18
Abstract
Abstract HARDENED GELATIN IMAGES ARE FORMED FROM SILVER HALIDE IMAGES IN THE PRESENCE OF (A) A SILVER HALIDE SOLVENT, (B) AN ALKALI AND (C) A COMPOUND REPRESENTED BY THE GENERAL FORMULA 1: (+)N<(-A-Y-C(=)-S-B-) X(-) WHERE N AND C ARE JOINED WHEREIN A AND B ARE EACH NON-METAL ATOMS NECESSARY FOR FORMING A HETEROCYCLIC RING, Y IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF SULFUR AND SELENIUM, AND X IS AN ANION.
Inventors
- 👤 T Shishido
- 👤 R Ohi
- 👤 J Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:55
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/315; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/12
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |