US3575947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic olefin conversion
Assignee: Phillips Petroleum Co
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Filing: 1968-11-21
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Granted: 1971-04-20
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Expires: 1988-11-21
Abstract
Abstract CYCIC OLEFINIC HYDROCARBONS INCLUDING MONO-AND POLYENES ARE CONVERTED INTO POLYUNSATURATED HYDROCARBONS OF HIGHER MOLECULAR WEIGHT BY CONTACTING THE OLEFIN WITH A CATALYST ACTIVE FOR THE DISPROPORTIONATION OF ACYCLIC OLEFINS HAVING THREE OR MORE CARBON ATOMS INTO OTHER OLEFINS OF BOTH HIGHER AND LOWER MOLECULAR WEIGHT.
Inventors
- 👤 Donald L Crain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:08
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C6/06; C08F; C08F10/00; C08F132/00
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |