US2953455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide emulsions containing a ruthenium, palladium or platinum hydroxide in stabilizing amounts and process for preparing the same
Assignee: EIDP Inc
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Filing: 1957-08-28
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Granted: 1960-09-20
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Expires: 1977-08-28
Abstract
No abstract record available.
Inventors
- 👤 Maffet Vere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE STABILIZATION OF A DIGESTED PHOTOGRAHIC WATER-PERMEABLE COLLOID-SILVER HALIDE EMULSION WHICH COMPRISES UNIFORMLY ADMIXING WITH SAID EMULSION AN AQEUOUS DISPERSION OF FINELY DIVIDED PARTICLES OF A WATER-INSOLUBLE METAL HYDROXIDE TAKEN FROM THE GROUP CONSISTING OF RUTHENIUM, PALLADIUM AND PLATINUM HYDROXIDE IN A STABILIZING AMOUNT LESS THAN 0.1 MOLE PER 1000 MOLES OF SILVER HALIDE.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE STABILIZATION OF A DIGESTED PHOTOGRAHIC WATER-PERMEABLE COLLOID-SILVER HALIDE EMULSION WHICH COMPRISES UNIFORMLY ADMIXING WITH SAID EMULSION AN AQEUOUS DISPERSION OF FINELY DIVIDED PARTICLES OF A WATER-INSOLUBLE METAL HYDROXIDE TAKEN FROM THE GROUP CONSISTING OF RUTHENIUM, PALLADIUM AND PLATINUM HYDROXIDE IN A STABILIZING AMOUNT LESS THAN 0.1 MOLE PER 1000 MOLES OF SILVER HALIDE.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |