Patent US3702824A successfully refreshed from Google Patents.
US3702824A
Expired / Lapsed
US
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Friction reducing agent for lubricants
Assignee: Texaco Inc
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Filing: 1970-06-12
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Granted: 1972-11-14
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Expires: 1990-06-12
Abstract
Abstract HYDROXYLAKYL ESTERS OF ALKANEPHOSPHONATES REPRESENTED BY THE FORMULA: H-(O-CH(-R'')-CH(-R''))N-P(=O)(-R)-O-(CH(-R'')-CH(-R'')-O)M-H IN WHICH R IS A SUBSTANTIALLY STRAIGHT CHAIN ALKYL RADICAL HAVING FROM ABOUT 11 TO 40 CARBON ATOMS, R'' IS HYDROGEN OR AN ALKYL RADICAL HAVING FROM 1 TO 20 CARBON ATOMS, M IS AN INTEGER FROM 1 TO 10 AND N IS 0 OR AN INTEGER FROM 1 TO 10, AND A LUBRICATING OIL COMPOSITION CONTAINING A HYDROXYLAKYL ESTER OF ALKANEPHOSPHONATE.
Inventors
- 👤 Raymond C Schlicht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:30
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/12; C10M161/00; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/06; C10M2223/065; C10M2225/00; C10M2225/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/08
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |