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:
Oct. 02, 1990
Filed:
Oct. 16, 1989
Hiromichi Seiki, Ichihara, JP;
Idemitsu Kosan Company Limited, Tokyo, JP;
Abstract
The present invention provides a lubricating oil composition comprising 97 to 60% by weight of mineral oil and 3 to 40% by weight of polyester, said mineral oil having a kinematic viscosity of 100.degree. C. of 2 to 50 centistokes, a pour point (as determined by JIS K-2269) of not more than -30.degree. C., and a viscosity index (as determined by JIS K-2283) of not less than 70. This lubricating oil composition is suitably, used for lubrication of parts including a wet brake and a wet clutch, such as automatic transmissions and tractors. The lubricating oil composition of the present invention has a suitable viscosity at high temperatures and further is low in low temperature viscosity. Furthermore the lubricating oil composition of the present invention is excellent in friction characteristics, oxidation stability and also in seal rubber compatibility.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile