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:
Jan. 27, 2026
Filed:
Dec. 23, 2022
Applicant:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Inventors:
Shota Kato, Chiyoda-ku, JP;
Yukio Yoshida, Chiyoda-ku, JP;
Assignee:
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 169/04 (2006.01); C10M 145/14 (2006.01); C10M 155/04 (2006.01); C10M 157/10 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01);
U.S. Cl.
CPC ...
C10M 169/041 (2013.01); C10M 145/14 (2013.01); C10M 155/04 (2013.01); C10M 157/10 (2013.01); C10M 2203/003 (2013.01); C10M 2209/084 (2013.01); C10M 2229/00 (2013.01); C10N 2020/04 (2013.01); C10N 2030/02 (2013.01);
Abstract
A viscosity index improver composition which has an excellent viscosity index improving effect. A viscosity index improver composition which includes a poly(meth)acrylate (A) including a constituent unit (Y) derived from a monomer (y) having a diol functional group, and a poly(meth)acrylate (B) including a constituent unit (Z) derived from a monomer (z) having a boronic acid ester.