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:
Mar. 03, 1998
Filed:
Feb. 12, 1996
Shizuo Kitahara, Kawaguchi, JP;
Yutaka Shikatani, Kawasaki, JP;
Junichi Igarashi, Tokyo, JP;
Yoshihide Ishikawa, Himeji, JP;
Shinsuke Hasegawa, Hyogo, JP;
Michio Miyamoto, Kakogawa, JP;
Nippon Zeon Co., Ltd., Tokyo, JP;
Harima Chemicals, Inc., Kakogawa, JP;
Nippon Oil Company, Ltd., Tokyo, JP;
Abstract
An oil-soluble polyester having a weight average molecular weight of 10,000 to 1,000,000, which is a polycondensate prepared by polycondensing the following ingredients (A) and (B): (A) a dicarboxylic acid ingredient, and (B) a diol ingredient comprising (i) a hindered glycol represented by the following formula: HO--CH.sub.2 --CR.sup.1 R.sup.2 --CH.sub.2 --OH wherein R.sup.1 and R.sup.2 independently represent a linear or branched alkyl group, and (ii) an alkylene glycol having at least 4 carbon atoms in the main chain. This oil-soluble polyester is useful as an additive for a lubricating oil.