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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.:

US 9683195 B1

PDFFull Text
Date of Patent:
Jun. 20, 2017

Filed:

Feb. 25, 2015

Viscosity index improver and lubricating oil composition

Applicant:

Sanyo Chemical Industries, Ltd., Kyoto, JP;

Inventors:

Shigekuni Nakada, Kyoto, JP;

Ayumu Sakaguchi, Kyoto, JP;

Takenori Tatsumi, Kyoto, JP;

Hiroki Yamashita, Kyoto, JP;

Assignee:

SANYO CHEMICAL INDUSTRIES, LTD., Kyoto, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Vishal Vasisth

Int. Cl.
CPC ...
C10M 133/56 (2006.01); C10M 145/14 (2006.01); C10M 149/04 (2006.01); C10M 149/10 (2006.01); C10M 153/02 (2006.01);
U.S. Cl.
CPC ...
C10M 145/14 (2013.01); C10M 149/04 (2013.01); C10M 149/10 (2013.01); C10M 153/02 (2013.01); C10M 2209/084 (2013.01); C10M 2217/022 (2013.01); C10M 2217/028 (2013.01); C10M 2225/02 (2013.01); C10N 2220/021 (2013.01); C10N 2220/022 (2013.01); C10N 2230/02 (2013.01); C10N 2230/06 (2013.01); C10N 2230/10 (2013.01); C10N 2230/12 (2013.01); C10N 2230/18 (2013.01); C10N 2230/70 (2013.01); C10N 2240/042 (2013.01); C10N 2240/044 (2013.01); C10N 2240/045 (2013.01);
Abstract

The present invention aims to provide a viscosity index improver excellent in shear stability and having a low HTHS viscosity and a high viscosity index. The viscosity index improver of the present invention contains a (co)polymer (A) containing a polyolefin-based monomer as an essential monomer unit, and a base oil, wherein the absolute value of difference in solubility parameter between the (co)polymer (A) and the base oil is 0.8 to 2.0 (cal/cm).

Find Patent Forward Citations

Nakada, Shigekuni. (2017). Viscosity index improver and lubricating oil composition (U.S. Patent No. 9683195). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9683195

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