US3663479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended-surface dispersible hydrogenation catalyst and process for producing same
Assignee: United States Department of Agriculture
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Filing: 1970-06-24
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Granted: 1972-05-16
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Expires: 1990-06-24
Abstract
Abstract NYLON IS DISSOLVED IN AN AQUEOUS SOLUTION OF FORMIC ACID, OR DISSOLVED IN A PRIMARY SOLVENT SUCH AS ORTHO-PHOSPHORIC ACID, META-CRESOL, OR PHENOL, IN CONJUNCTION WITH ETHYL ALCOHOL AS A SECONDARY SOLVENT, THEN PRECIPITATED IN MICROSCOPIC-SIXED PARTICLES BY THE ADDITION OF WATER. THE PRECIPITATED NYLON PARTICLES ARE WASHED WITH WATER UNTILL FREE OF SOLVENT. THE NYLON PARTICLES ARE MIXED WITH AN AQUEOUS SOLUTION OF A PLATINUM (OR PALLADIUM) COMPOUND, STIRRED AND HEATED, THEREBY PRODUCING AN EASILY DISPERSED HYDROGENATION CATALYST OF HIGH SURFACE AREA THAT IS USEFUL FOR SELECTIVELY HYDROGENATING UNSATURATED FATTY ESTERS.
Inventors
- 👤 Norman V Lovegren
- 👤 Marie S Gray
- 👤 Reuben O Feuge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:30
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/14; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J31/00; B01J31/02; B01J31/06; B01J31/26; B01J31/28; B01J31/30; C11; C11C; C11C3/00; C11C3/12; C11C3/126; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; C08J2377/00
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |