Patent US3304261A successfully refreshed from Google Patents.
US3304261A
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Mineral lubricating oil compositions containing terpolymer viscosity index improvers
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-01-24
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Granted: 1967-02-14
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Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 Ilnyckyj Stephan
- 👤 George A Holder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:46
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F10/00; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A LUBRICATING OIL COMPOSITION COMPRISING A MINERAL LUBRICATING OIL AND A VISCOSITY INDEX IMPROVING AMOUNT OF A TERPOLYMER FORMED FROM ETHYLENE, AN UNSATURATED ALIPHATIC MONOCARBOXYLIC ACID ESTER OF FROM 4 TO 20 CARBON ATOMS PER MOLECULE, AND AT LEAST ONE UNSATURATED DICARBOXYLIC ACID DIESTER OF A SATURATED MONOHYDRIC PRIMARY ALCOHOL CONTAINING IN THE RANGE OF 8 TO 18 CARBON ATOMS PER MOLECULE AND OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ALPHA-BETA UNSATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES.
Claim 2
Dependent Claim
79 words
A LUBRICATING OIL COMPOSITION COMPRISING A MINERAL LUBRICATING OIL AND A VISCOSITY INDEX IMPROVING AMOUNT OF A TERPOLYMER FORMED FROM ETHYLENE, AN UNSATURATED ALIPHATIC MONOCARBOXYLIC ACID ESTER OF FROM 4 TO 20 CARBON ATOMS PER MOLECULE, AND AT LEAST ONE UNSATURATED DICARBOXYLIC ACID DIESTER OF A SATURATED MONOHYDRIC PRIMARY ALCOHOL CONTAINING IN THE RANGE OF 8 TO 18 CARBON ATOMS PER MOLECULE AND OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ALPHA-BETA UNSATURATED DICARBOXYLIC ACIDS AND THEIR ANHYDRIDES.
References Cited (Backward Citations)
US2993032A
Cited
US3215657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |