Patent US3763244A successfully refreshed from Google Patents.
US3763244A
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Process for producing a c6-c16 normal alpha-olefin oligomer having a pour point below about- f.
Assignee: Ethyl Corp
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Filing: 1971-11-03
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Granted: 1973-10-02
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Expires: 1991-11-03
Abstract
Abstract OLIGOMERS OF NORMAL-C6-16 ALPHA-OLEFINS USEFUL AS LUBRICANTS CAN BE MADE BY REACTING C6-16 NORMAL-ALPHAOLEFINS OR MIXTURE THEREOF AT A TEMPERATURE OF FROM ABOUT 10-60* C. USING A WATER PROMOTED BORON TRIFLUORIDE CATALYST IN WHICH BORON TRIFLUORIDE IS USED IN MOLAR EXCESS OF THE WATER. PREFERABLY, ADDITIONAL BORON TRIFLUORIDE IS INJECTED INTO THE REACTION LIQUID PHASE DURING THE COURSE OF THE OLIGOMERIZATION. STABILITY OF THE RESULTANT PRODUCT IS IMPROVED BY CATALYTIC HYDROGENATION. THE PRODUCTS HAVE A LOW POUR POINT AND HIGH VISCOSITY INDEX.
Inventors
- 👤 R Shubkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:12
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C9/00; C07C9/22; C10; C10M; C10M107/00; C10M107/02; C10M107/10; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213
Claims Analysis
Total Claims: 0
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |