US3634249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-11-15
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Granted: 1972-01-11
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Expires: 1988-11-15
Abstract
Abstract LUBRICATING OIL COMPOSITIONS EXHIBITING GOOD VISCOSITY INDEX, POUR POINT, RESISTANCE TO OXIDATION, AND SHEAR STABILITY PROPERTIES MAY BE FORMULATED FROM MINERAL OIL OR SYNTHETIC OIL BASE STOCKS AND OILY ETHYLENE-PROPYLENE COPOYLYMERS BOILING ABOUVE 450* C. PREPARED FROM ETHYLENE AND PROPYLENE IN MOLE RATIO OF 1.5-0.43:1.
Inventors
- 👤 Robert Dupas
- 👤 Marcel Ostyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:06
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/02; C08; C08F; C08F210/00; C10M111/00; C10M111/04; C10M3/00; C10M2205/00; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10N; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 0
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |