US3341333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing photographic emulsions
Assignee: GAF Chemicals Corp
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Filing: 1963-10-18
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Granted: 1967-09-12
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Guenther H Klinger
- 👤 Peter A Landskroener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE PROCESS FOR PREPARING GELATINO-SILVER HALIDE EMULSIONS WHICH COMPRISES, IN COMBINATION, THE STEPS OF ADDING IN ANY SEQUENCE, AFTER MAKING, TO SUCH AN EMULSION CONTAINING IN EXCESS OF 1% OF GELATIN, A SMALL PROPORTION OF A COAGULANT NAMELY NOT MORE THAN 15% OF THE AMOUNT REQUIRED TO CAUSE SUBSTANTIALLY COMPLETE COAGULATION OF THE EMULSION, ADDING A PRECIPITANT IN SUFFICIENT PROPORTIONS TO OBTAIN RAPID SETTLING OF THE GELATINO-SILVER HALIDE IN A RELATIVELY COARSE STATE OF SUBDIVISION, AND WASHING THE PRECIPITANT TO REMOVE SOLUBLE SALTS AND TO RECOVER A HIGH PROPORTION OF UNREACTED SILVER.
Claim 2
Dependent Claim
92 words
THE PROCESS FOR PREPARING GELATINO-SILVER HALIDE EMULSIONS WHICH COMPRISES, IN COMBINATION, THE STEPS OF ADDING IN ANY SEQUENCE, AFTER MAKING, TO SUCH AN EMULSION CONTAINING IN EXCESS OF 1% OF GELATIN, A SMALL PROPORTION OF A COAGULANT NAMELY NOT MORE THAN 15% OF THE AMOUNT REQUIRED TO CAUSE SUBSTANTIALLY COMPLETE COAGULATION OF THE EMULSION, ADDING A PRECIPITANT IN SUFFICIENT PROPORTIONS TO OBTAIN RAPID SETTLING OF THE GELATINO-SILVER HALIDE IN A RELATIVELY COARSE STATE OF SUBDIVISION, AND WASHING THE PRECIPITANT TO REMOVE SOLUBLE SALTS AND TO RECOVER A HIGH PROPORTION OF UNREACTED SILVER.
References Cited (Backward Citations)
GB884840A
Cited
FR1279110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |