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. 26, 2019
Filed:
Mar. 12, 2014
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Kouji Takane, Ichihara, JP;
Yukitoshi Fujinami, Ichihara, JP;
Hiroki Sekiguchi, Ichihara, JP;
Yusuke Nakanishi, Sodegaura, JP;
Yoshiyuki Suetsugu, Sodegaura, JP;
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Abstract
A bearing grease composition contains a (A) thickener and a (B) base oil, in which the (A) thickener is a urea thickener represented by a formula (I) below, and, in observation of a transmission image in the bearing grease composition, a transmission-image-area ratio of an aggregation part having a transmission image area exceeding 40 μmin the urea thickener is 15% or less relative to a total observation area.RNHCONHRNHCONHR  (I) In the formula, Rand Reach independently represent: an (a1) monovalent chain hydrocarbon group having 6 to 22 carbon atoms; an (a2) monovalent alicyclic hydrocarbon group having 6 to 12 carbon atoms; and the like, and Rrepresents an (a4) divalent aromatic hydrocarbon group having 6 to 15 carbon atoms.