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. 07, 2015
Filed:
Jan. 25, 2010
Shigeki Matsui, Tokyo, JP;
Akira Yaguchi, Tokyo, JP;
Reiko Kudo, Tokyo, JP;
Hiroya Miyamoto, Tokyo, JP;
Teppei Tsujimoto, Tokyo, JP;
Shigeki Matsui, Tokyo, JP;
Akira Yaguchi, Tokyo, JP;
Reiko Kudo, Tokyo, JP;
Hiroya Miyamoto, Tokyo, JP;
Teppei Tsujimoto, Tokyo, JP;
JX Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
The lubricating oil composition of the invention comprises a lubricating base oil with a kinematic viscosity at 100° C. of 1-20 mm/s, and a viscosity index improver having a ratio M/Mof 0.20 or greater, between the total area of the peaks between chemical shifts of 36-38 ppm Mand the total area of the peaks between chemical shifts of 64-66 ppm M, with respect to the total area of all of the peaks, in the spectrum obtained byC-NMR. The lubricating oil composition of the invention has excellent effects, with a sufficiently high HTHS viscosity at 150° C., and a sufficiently low kinematic viscosity at 40° C., a sufficiently low kinematic viscosity at 100° C. and a sufficiently low HTHS viscosity at 100° C.