Patent US3711864A successfully refreshed from Google Patents.
US3586731A
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Olefin conversion and catalysts therefor
Assignee: Phillips Petroleum Co
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Filing: 1967-04-03
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Granted: 1971-06-22
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Expires: 1987-04-03
Abstract
Abstract OLEFINS ARE CONVERTED TO OTHER OLEFINS HAVING DIFFERENT MOLECULAR WEIGHTS BY CONTACT WITH AN OLEFIN REACTION CATALYST ACTIVE FOR DISPROPORTIONATING PROPYLENE INTO ETHYLENE AND BUTENE COMPRISING SILICA PROMOTED WITH AN OXIDE SULFIDE OR HEXACARBONYL OF TUNGSTEN OR MOLYBDENUM OR WITH AN OXIDE OF RHENIUM, VANADIUM, NIOBIUM OR TANTALUM AND TREATED WITH A MODIFYING AMOUNT OF A COMPOUND OF AN ALKALI METAL OR AN ALKALINE EARTH METAL.
Inventors
- 👤 Louis F Heckelsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:10
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J27/00; B01J27/02; B01J27/04; B01J27/047; B01J27/057; B01J27/0576; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C2523/00; C07C2523/16; C07C2523/20; C07C2523/22; C07C2523/24; C07C2523/28; C07C2523/30; C07C2523/32; C07C2523/36; C07C2527/00; C07C2527/02; C07C2527/04; C07C2527/047; C07C2527/051; C07C2527/057; C07C2531/00; C07C2531/16; C07C2531/20
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |