Patent US2908735A successfully refreshed from Google Patents.
US2908735A
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Isomerization of normal butane
Assignee: Universal Oil Products Co
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Filing: 1956-01-11
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Granted: 1959-10-13
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Expires: 1976-01-11
Abstract
No abstract record available.
Inventors
- 👤 Haensel Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:27
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR THE PRODUCTION OF ISOBUTANE FROM A SUBSTANTIALLY PURE NORMAL BUTANE CHARGE WHICH COMPRISES SUBJECTING SAID CHARGE AT AN ISOMERIZING TEMPERATURE UP TO ABOUT 950*F. AND A PRESSURE FROM ABOUT 15 TO 1500 LBS. PER SQUARE INCH TO THE ACTION OF A CATALYST COMPRISING A MAJOR PORTION OF REFRACTORY METAL OXIDE, FROM ABOUT 0.01% TO ABOUT 1% BY WEIGHT OF PLATINUM AND FROM ABOUT 0.1% TO ABOUT 10% BY WEIGHT OF COMBINED HALOGEN.
Claim 2
Dependent Claim
75 words
A PROCESS FOR THE PRODUCTION OF ISOBUTANE FROM A SUBSTANTIALLY PURE NORMAL BUTANE CHARGE WHICH COMPRISES SUBJECTING SAID CHARGE AT AN ISOMERIZING TEMPERATURE UP TO ABOUT 950*F. AND A PRESSURE FROM ABOUT 15 TO 1500 LBS. PER SQUARE INCH TO THE ACTION OF A CATALYST COMPRISING A MAJOR PORTION OF REFRACTORY METAL OXIDE, FROM ABOUT 0.01% TO ABOUT 1% BY WEIGHT OF PLATINUM AND FROM ABOUT 0.1% TO ABOUT 10% BY WEIGHT OF COMBINED HALOGEN.
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) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |