US2782167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity index improvers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1950-11-30
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Granted: 1957-02-19
•
Expires: 1970-11-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Tutwiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:23
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F16/00; C08F16/12; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A LUBRICATING COMPOSITION COMPRISING A LUBRICATING OIL HAVING COMBINED THEREIN FROM 0.01% TO 10.0% BY WEIGHT OF AN OIL SOLUBLE COPOLYMER OF FROM 20% TO 50% BY WEIGHT OF A METHOXY VINYL ETHER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
37 words
A LUBRICATING COMPOSITION COMPRISING A LUBRICATING OIL HAVING COMBINED THEREIN FROM 0.01% TO 10.0% BY WEIGHT OF AN OIL SOLUBLE COPOLYMER OF FROM 20% TO 50% BY WEIGHT OF A METHOXY VINYL ETHER HAVING THE GENERAL FORMULA
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US2020703A
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Cited
US2479146A
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US2544375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |