US2530874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of normal pentane
Assignee: Gulf Research and Development Co
•
Filing: 1946-12-18
•
Granted: 1950-11-21
•
Expires: 1966-12-18
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Gwynn
- 👤 Charles W Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:18
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; C07C5/2789; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A PROCESS OF PRODUCING ISOPENTANE FROM NORMAL PENTANE BY CONTACTING NORMAL PENTANE WITH AN ALUMINUM HALIDE CATALYST IN THE PRESENCE OF A HYDROGEN HALIDE UNDER ISOMERIZING CONDITIONS AND IN THE ABSENCE OF A CRACKING INHIBITOR OTHER THAN THAT SPECIFIED BELOW, THE IMPROVEMENT COMPRISING CONTACTING WITH SAID ALUMINUM HALIDE AND HYDROGEN HALIDE IN A REACTION ZONE AT A TEMPERATURE BELOW ABOUT 70*C. A CHARGE MIXTURE CONSISTING ESSENTIALLY OF NORMAL PENTANE AND ISOPENTANE, SAID CHARGE MIXTURE CONTAINING ABOUT 35 TO ABOUT 45 PER CENT BY WEIGHT OF ISOPENTANE, SAID ISOPENTANE ACTING TO INHIBIT CRACKING OF SAID NORMAL PENTANE, AND WITHDRAWING FROM SAID REACTION ZONE A REACTION MIXTURE CONTAINING SUBSTANTIALLY MORE ISOPENTANE THAN WAS PRESENT INITIALLY AND NOT MORE THAN ABOUT 60 PER CENT BY WEIGHT OF ISOPENTANE.
Claim 2
Dependent Claim
126 words
IN A PROCESS OF PRODUCING ISOPENTANE FROM NORMAL PENTANE BY CONTACTING NORMAL PENTANE WITH AN ALUMINUM HALIDE CATALYST IN THE PRESENCE OF A HYDROGEN HALIDE UNDER ISOMERIZING CONDITIONS AND IN THE ABSENCE OF A CRACKING INHIBITOR OTHER THAN THAT SPECIFIED BELOW, THE IMPROVEMENT COMPRISING CONTACTING WITH SAID ALUMINUM HALIDE AND HYDROGEN HALIDE IN A REACTION ZONE AT A TEMPERATURE BELOW ABOUT 70*C. A CHARGE MIXTURE CONSISTING ESSENTIALLY OF NORMAL PENTANE AND ISOPENTANE, SAID CHARGE MIXTURE CONTAINING ABOUT 35 TO ABOUT 45 PER CENT BY WEIGHT OF ISOPENTANE, SAID ISOPENTANE ACTING TO INHIBIT CRACKING OF SAID NORMAL PENTANE, AND WITHDRAWING FROM SAID REACTION ZONE A REACTION MIXTURE CONTAINING SUBSTANTIALLY MORE ISOPENTANE THAN WAS PRESENT INITIALLY AND NOT MORE THAN ABOUT 60 PER CENT BY WEIGHT OF ISOPENTANE.
References Cited (Backward Citations)
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Cited
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US2334553A
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Cited
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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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |