Patent US2863931A successfully refreshed from Google Patents.
US2863931A
Expired / Lapsed
US
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Polymerization of olefins
Assignee: Gulf Oil Corp
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Filing: 1955-02-28
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Granted: 1958-12-09
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Claude R Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:18
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE POLYMERIZATION OF C3 AND C4 OLEFINS TO FORM A LIQUID POLYMERIZED PRODUCT COMPRISING PASSING THE OLEFINS IN A GASEOUS MIXTURE OF HYDROCARBONS HAVING AN OLEFIN CONTENT OF ABOUT 30 TO 70 PERCENT DOWNWARDLY THOUGH A SERIES OF BEDS OF A SOLID POLYMERIZATION CATALYST IN A SINGLE VERTICAL CYLINDRICAL REACTOR, COLLECTING POLYMERIZED LIQUID PRODUCT AT THE BOTTOM OF EACH OF THE CATALYST BEDS, WITHDRAWING THE COLLECTED POLYMERIZED LIQUID PRODUCT FROM THE REACTOR AT EACH OF THE CATALYST BEDS, PASSING UNPOLYMERIZED GASES THROUGH A RESTRICTED PASSAGE FROM ONE CATALYST BED TO THE NEXT LOWER CATALYST
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE POLYMERIZATION OF C3 AND C4 OLEFINS TO FORM A LIQUID POLYMERIZED PRODUCT COMPRISING PASSING THE OLEFINS IN A GASEOUS MIXTURE OF HYDROCARBONS HAVING AN OLEFIN CONTENT OF ABOUT 30 TO 70 PERCENT DOWNWARDLY THOUGH A SERIES OF BEDS OF A SOLID POLYMERIZATION CATALYST IN A SINGLE VERTICAL CYLINDRICAL REACTOR, COLLECTING POLYMERIZED LIQUID PRODUCT AT THE BOTTOM OF EACH OF THE CATALYST BEDS, WITHDRAWING THE COLLECTED POLYMERIZED LIQUID PRODUCT FROM THE REACTOR AT EACH OF THE CATALYST BEDS, PASSING UNPOLYMERIZED GASES THROUGH A RESTRICTED PASSAGE FROM ONE CATALYST BED TO THE NEXT LOWER CATALYST
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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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |