US3597209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing silver halide emulsions comprising the addition of excess chloride ion
Assignee: EIDP Inc
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Filing: 1968-01-25
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Granted: 1971-08-03
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Expires: 1988-01-25
Abstract
Abstract RADIATION-SENSITIVE EMULSIONS AND ELEMENTS PARTICULARLY SUITABLE FOR USE IN HIGH INTENSITY OSCILLOGRAPHS ARE PREPARED BY ADDING TO A COLLOID-SILVER HALIDE EMULSION OF THE DEVELOPING-OUT TYPE OR DIRECT-WRITING TYPE, A LARGE AMOUNT OF A WATER SOLUBLE CHLORIDE SALT OF THE ORDER OF ABOUT 160 MOLE PERCENT BASED ON THE SILVER HALIDES AFTER DIGESTION AND PRIOR TO COATING THE EMULSION ON A SUPPORT.
Inventors
- 👤 Robert Chapman Countryman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:06
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/49
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |