Patent US3814696A successfully refreshed from Google Patents.
US3814696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloidal metal in non-aqueous media
Assignee: Eastman Kodak Co
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Filing: 1972-06-19
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Granted: 1974-06-04
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Expires: 1992-06-19
Abstract
Abstract COLLOIDAL METAL HAVING AN AVERAGE DIAMETER RANGE FROM ABOUT 45 A. TO ABOUT 300 A. IN A NON-AQUEOUS MEDIUM IS PREPARED BY REDUCTION OF A WATER SOLUBLE METAL SALT BY A REDUCING AGENT, SUCH AS, A BOROHYDRIDE, IN THE PRESENCE OF A FATTY ACID OR FATTY ACID SALT, SUCH AS, MYRISTIC ACID OR MYRISTATE, IN AN AQUEOUS SOLUTION. NOBLE METALS ARE PREFERRED, PARTICULARLY SILVER AND PALLADIUM. AN ORGANIC WATER IMMISCIBLE SOLVENT, SUCH AS, TOLUENE, IS ADDED TO THE SOLUTION AND ACIDIFIED. THE ORGANIC SOLVENT PHASE IS SEPARATED WITH THE COLLOIDAL METAL SUSPENDED THEREIN.
Inventors
- 👤 J Verdone
- 👤 M Kebles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:58
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |