Patent JPS5140459A successfully refreshed from Google Patents.
US2824840A
Expired / Lapsed
US
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Lubricating oil composition
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-04-01
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Granted: 1958-02-25
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Expires: 1973-04-01
Abstract
No abstract record available.
Inventors
- 👤 Edward P Cashman
- 👤 Ethel J Corcoran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10M; C10M1/00; C10M1/08; C10L1/19; C10L1/1915; C10L1/192; C10L1/198; C10L1/1985; C10L1/1986; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10N; C10N2050/00; C10N2050/10; F; F02; F02B; F02B3/00; F02B3/06; F02B47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A LUBRICATING OIL COMPOSITION COMPNISING A MAJOR PROPORTION OF A LUBRICATING OIL AND A MINOR POUR DEPRESSING AMOUNT OF AN OIL-SOLUBLE POLYMERIC MATERIAL HAVING A MOLECULAR WEIGHT OF A LEAST ABOUT 1000 SELECTED FROM THE GROUP CONSISTING OF (1) POLYMERS OF A COMPLEX ESTER, (2) COPOLYMERS OF SAID COMPLEX ESTER WITH A DIESTER AND (3) COPOLYMERS OF SAID COMPLEX ESTER WITH VINYL ACETAATE, SAID COMPLEX ESTER BEING PREPARED BY ESTERIFYING 2 MOLES OF AN ALPHA, BETA UNSATURATED DISCARBOXYLIC ACID HAVING 4 TO 7 CARBON ATOMS PER MOLECULE WITH 1 MOLE OF A GYLCOL HAVING THE FORMULA
Claim 2
Dependent Claim
96 words
A LUBRICATING OIL COMPOSITION COMPNISING A MAJOR PROPORTION OF A LUBRICATING OIL AND A MINOR POUR DEPRESSING AMOUNT OF AN OIL-SOLUBLE POLYMERIC MATERIAL HAVING A MOLECULAR WEIGHT OF A LEAST ABOUT 1000 SELECTED FROM THE GROUP CONSISTING OF (1) POLYMERS OF A COMPLEX ESTER, (2) COPOLYMERS OF SAID COMPLEX ESTER WITH A DIESTER AND (3) COPOLYMERS OF SAID COMPLEX ESTER WITH VINYL ACETAATE, SAID COMPLEX ESTER BEING PREPARED BY ESTERIFYING 2 MOLES OF AN ALPHA, BETA UNSATURATED DISCARBOXYLIC ACID HAVING 4 TO 7 CARBON ATOMS PER MOLECULE WITH 1 MOLE OF A GYLCOL HAVING THE FORMULA
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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |