Mineral oil composition
Abstract
Abstract A MINERAL OIL COMPOSITION COMPRISING A NEUTRAL, NONVOLATILE, MINERAL OIL BASE AND, AS A VISCOSITY INDEX IMPROVER, AN EFFECTIVE AMOUNT, FOR EXAMPLE, 0.5-3 WEIGHT PERCENT, OF AN ESSENTIALLY AMORPHOUS, OIL SOLUBLE COPOLYMER HAVING RANDOM REPEAT UNITS DERIVED, ON A WEIGHT BASIS WITH THE COMBINED WEIGHTS TOTALLING 100%, (A) 25-55% FROM ETHYLENE, (B) 37-75% FROM A TERMINALLY UNSATURATED STRAIGHT CHAIN MONOOLEFIN HAVING 3-12 CARBON ATOMS, (C) 0.1-10% FROM A NON-CONJUGATED DIOLEFIN HAVING 518 CARBON ATOMS AND ONLY ONE POLYMERIZABLE DOUBLE BOND, AND (D) 0.1-2% FROM A NON-CONJUGATED DIOLEFIN HAVING 518 CARBON ATOMS AND TWO POLYMERIZABLE DOUBLE BONDS, SAID COPOLYMER HAVING AN INHERENT VISCOSITY OF 0.7-1.8 AS MEASURED ON A 0.1 WEIGHT PERCENT SOLUTION IN TETRACHLOROETHYLENE AT 30*C. AND A WALLACE PLASTICITY OF AT LEAST 16, SAID COPOLYMER FURTHER CHARACTERIZED AS EXHIBITING SUPERIOR PROCESSABILITY AND ISOLABILITY AND GOOD SHEAR STABILITY.
Inventors
- 👤 J Campbell
- 👤 E Cluff
- 👤 C Sarafidis
Bibliographic Details
Claims Analysis
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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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |