Synthetic oils
Abstract
Abstract THE PRESENT INVENTION RELATES TO SYNTHETIC OILS WHICH ARE TERTIARY-ALKYLATED BENZENE AND -NAPHTHALENE, WHEREIN THE TERTIARY ALKYL SUBSTITUENTS CONTAIN FROM 7 TO 44, PREFERABLY AN AVERAGE OF FROM 14 TO 44 CARBON ATOMS. THE COMPOSITIONS HAVE UTILITY AS HYDRAULIC OILS, AS LUBRICANTS, AND IN THE FORMULATION OF GREASES. THE TERTIARY ALKYL-BENZENES AND -NAPHTHALENES HAVE HIGHER BOILING POINTS AND LOWER VISCOSITIES THAN THE NATURAL PETROLEUM OILS OF THE SAME AVERAGE NUMBER OF TOTAL CARBON ATOMS, THEREBY PROVIDING A SUPERIOR PRODUCT WHERE LOW VOLATILITY AND HIGH FLASH POINT AT A GIVEN VISCOSITY ARE REQUIRED. THE SUBSTANTIAL ABSENCE OF A HYDROGEN ATOM ON THE CARBON ALPHA TO THE BENZENE RING MAKES THE COMPOSITIONS OF THE PRESENT INVENTION MUCH SUPERIOR IN OXIDATION AND THERMAL STABILITY AS COMPARED TO THE PRIMARY AND SECONDARY ALKYL BENZENES AND NATURAL PETROLEUM OILS WHICH ARE AVAILABLE.
Inventors
- 👤 J Boggs
- 👤 A Langer
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |