The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1985
Filed:
Aug. 10, 1983
Pierre D Marin, Bonsecours, FR;
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
An oxidation-resistant hydrocarbon oil composition is made by catalytically hydrogen-refining under relatively severe conditions a hydrocarbon oil basestock boiling in the lube oil boiling range and separately catalytically hydrogen-refining under relatively mild conditions a hydrocarbon fraction boiling in the lube oil range and having an aniline point exceeding 60.degree. C. and a sulfur content of at least 2.0 wt %. The resulting severely-refined basestock has a sulfur content not greater than 0.10 wt % and the resulting mildly-refined fraction has a sulfur content of at least 1.0 wt %, and the desired oxidation resistant composition is a blend comprising 85 to 99.9 wt % of the former and 15 to 0.1 wt % of the latter.