Patent US3780128A successfully refreshed from Google Patents.
US3780128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricants by oligomerization and hydrogenation
Assignee: Ethyl Corp
•
Filing: 1971-11-03
•
Granted: 1973-12-18
•
Expires: 1991-11-03
Abstract
Abstract OLIGOMERS OF NORMAL -C6-16 ALPHA-OLEFINS AS LUBRICANTS CAN BE MADE BY REACTING C6-16 NORMAL-ALPHA-OLEFINS OR MIXTURES THEREOF AT A TEMPERATURE OF FROM ABOUT 10-60* C. USING AN ALCOHOL-PROMOTED BORON TRIFLUORIDE CATALYST IN WHICH BORON TRIFLUORIDE IS USED IN MOLAR EXCESS OF THE ALCOHOL. 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 23:37
CPC Classifications
C; C07; C07C; C07C9/00; C07C9/22; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2531/00; C07C2531/02; C10; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |