US3706815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelated metal-polyphosphoric acid catalysts,method of preparation and isomerization process utilizing the same
Assignee: Union Oil Company of California
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Filing: 1971-05-24
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Granted: 1972-12-19
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Expires: 1991-05-24
Abstract
Abstract NOVEL CATALYSTS ARE PREPARED BY CHELATING IONS OF A GROUP VIII NOBLE METAL, E.G., PLATINUM, WITH A POLYPHOSPHORIC ACID AND DEPOSITING THE CHELATE ON A POROUS SUPPORT. THE CATALYST IS ESPECIALLY USEFUL FOR ISOMERIZING HYDROCARBONS.
Inventors
- 👤 Starling K Alley Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:48
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791; B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1845; B01J2231/00; B01J2231/50; B01J2231/52; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/824; B01J2531/828
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |