US3682823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic oils from alpha-olefins
Assignee: Shell USA Inc
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Filing: 1970-06-17
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Granted: 1972-08-08
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Expires: 1990-06-17
Abstract
Abstract FULLY HYDROGENATED NAPTHENIC HYDROCARBON LUBRICATING OILS HAVING LOW POUR POINTS, HIGH VISCOSITY INDICES AND CONTAINING AT LEAST 0.7 MOLE OF NAPHTHENE MOLECULES PER MOLE OF ISOPARAFFIN MOLECULES ARE PRODUCED BY OLIGOMERIZING C6-C12 NORMAL ALPHA-OLEFINS IN THE PRESENCE OF AN ALKALI METAL TETRAHALOALANATE CATALYST AND SUBSEQUENTLY HYDROGENATING THE RESULTING OLIGOMERIC PRODUCT.
Inventors
- 👤 George Smith
- 👤 Johannes M Wortel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/02; C10M107/10; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/20; C07C2/22; C07C9/00; C07C9/22; C08; C08F; C08F10/00; C10M7/00; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/125; C10G; C10G2400/00; C10G2400/10; C10M2201/00; C10M2201/06; C10M2201/065; C10M2201/066; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/14; C10M2205/00; C10M2205/02; C10M2205/028; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/287; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/10; C10M2215/102; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/042; C10M2217/043; C10M2217/044; C10M2217/045; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/10; C10M2219/104; C10M2219/108; C10N; C10N2010/00; C10N2010/02; C10N2020/00; C10N2020/01; C10N2050/00; C10N2050/08; C10N2050/10
Claims Analysis
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |