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:
Apr. 02, 2013
Filed:
Mar. 24, 2006
Ryousuke Kaneshige, Kisarazu, JP;
Akihiro Matsuda, Ichihara, JP;
Satoshi Ikeda, Ichihara, JP;
Keiji Okada, Ichihara, JP;
Masaaki Kawasaki, Ichihara, JP;
Ryousuke Kaneshige, Kisarazu, JP;
Akihiro Matsuda, Ichihara, JP;
Satoshi Ikeda, Ichihara, JP;
Keiji Okada, Ichihara, JP;
Masaaki Kawasaki, Ichihara, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
A lubricating oil composition for a power transmission system, which is excellent in both of low-temperature viscosity property and shear stability, is provided. The viscosity modifier of a lubricating oil for a power transmission system according to the present invention comprises an ethylene/α-olefin copolymer (B) having the properties: (B1) an ethylene content in the range of 70 to 85% by mol, (B2) an intrinsic viscosity [η] in the range of 0.2 to 1.0 dl/g, (B3) Mw/Mn not more than 2.4, and (B4) a melting point, as measured by DSC, not higher than 60° C., or no melting point observed.