Patent US3255272A successfully refreshed from Google Patents.
US3255272A
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Olefin dimerization
Assignee: Ethyl Corp
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Filing: 1961-08-30
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Granted: 1966-06-07
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Expires: 1981-08-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth L Lindsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:48
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/24; C07C2523/00; C07C2523/02; C07C2523/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR DIMERIZING A STRAIGHT CHAIN OLEFIN BEING CHARACTERIZED BY HAVING ONE DOUBLE BOND AND FROM 3 UP TO ABOUT 8 CARBON ATOMS WHICH COMPRISES HEATING SAID OLEFIN AT A TEMPERATURE NOT IN EXCESS OF 200*C. IN CONTACT WITH A CATALYST CONSISTING ESSENTIALLY OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM, AND CESIUM, AND A HYDROXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS HAVING AN ATOMIC NUMBER OF 19 TO 55, INCLUSIVE, AND BARIU, SAID HYDROXIDE BEING PRESENT IN AN AMOUNT BETWEEN 1 TO 50 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID ALKALI METAL AND SAID HYDROXIDE.
Claim 2
Dependent Claim
110 words
A PROCESS FOR DIMERIZING A STRAIGHT CHAIN OLEFIN BEING CHARACTERIZED BY HAVING ONE DOUBLE BOND AND FROM 3 UP TO ABOUT 8 CARBON ATOMS WHICH COMPRISES HEATING SAID OLEFIN AT A TEMPERATURE NOT IN EXCESS OF 200*C. IN CONTACT WITH A CATALYST CONSISTING ESSENTIALLY OF AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, RUBIDIUM, AND CESIUM, AND A HYDROXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS HAVING AN ATOMIC NUMBER OF 19 TO 55, INCLUSIVE, AND BARIU, SAID HYDROXIDE BEING PRESENT IN AN AMOUNT BETWEEN 1 TO 50 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF SAID ALKALI METAL AND SAID HYDROXIDE.
References Cited (Backward Citations)
US2466694A
Cited
US2881234A
Cited
US2986588A
Cited
US3087978A
Cited
US3095461A
Cited
US3207812A
Cited
US3185745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |