US2657246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective polymerization of isobutylene
Assignee: Standard Oil Development Co
•
Filing: 1950-04-21
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Granted: 1953-10-27
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Expires: 1970-04-21
Abstract
No abstract record available.
Inventors
- 👤 Helmuth G Schneider
- 👤 Hans G Goering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:28
CPC Classifications
C; C08; C08F; C08F240/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE PROCESS OF SELECTIVELY POLYMERIZING ISOBUTYLENE FROM ITS ADMIXTURE WITH OTHER OLEFINS OF 3 TO 5 CARBON ATOMS WHICH COMPRISES COOLING AND LIQUEFYING A HYDROCARBON MATERIAL CONSISTING SUBSTANTIALLY OF NORMAL BUTENES ISOBUTENE, AND BUTANE, THE AMOUNT OF ISOBUTENE BEING ABOUT 6 TO 20% OF THE ENTIRE REACTION MIXTURE, AND REFLUXING THE COOLED HYDROCARBON MATERIAL AT 0* C. IN THE PRESENCE OF 0.05% TO 0.83% BY WEIGHT, BASED ON THE FEED, OF SOLID, POWDERED, ANHYDROUS ALUMINUM CHLORIDE, WHEREBY SUBSTANTIALLY COMPLETE POLYMERIZATION OF THE ISOBUTYLENE IS OBTAINED BUT SUBSTANTIALLY NO OTHER BUTENES ARE POLYMERIZED.
Claim 2
Dependent Claim
92 words
THE PROCESS OF SELECTIVELY POLYMERIZING ISOBUTYLENE FROM ITS ADMIXTURE WITH OTHER OLEFINS OF 3 TO 5 CARBON ATOMS WHICH COMPRISES COOLING AND LIQUEFYING A HYDROCARBON MATERIAL CONSISTING SUBSTANTIALLY OF NORMAL BUTENES ISOBUTENE, AND BUTANE, THE AMOUNT OF ISOBUTENE BEING ABOUT 6 TO 20% OF THE ENTIRE REACTION MIXTURE, AND REFLUXING THE COOLED HYDROCARBON MATERIAL AT 0* C. IN THE PRESENCE OF 0.05% TO 0.83% BY WEIGHT, BASED ON THE FEED, OF SOLID, POWDERED, ANHYDROUS ALUMINUM CHLORIDE, WHEREBY SUBSTANTIALLY COMPLETE POLYMERIZATION OF THE ISOBUTYLENE IS OBTAINED BUT SUBSTANTIALLY NO OTHER BUTENES ARE POLYMERIZED.
References Cited (Backward Citations)
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Cited
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US2084082A
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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) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |