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:
Jul. 23, 2024
Filed:
Mar. 16, 2021
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Go Watanabe, Chiba, JP;
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Abstract
A grease composition may contain a base oil (A) and a urea-based thickener (B). Particles containing the urea-based thickener (B) in the grease composition may satisfy requirement (I). The base oil (A) may be a mixed base oil containing a high-viscosity base oil (A1) having a kinematic viscosity at 40° C. of 250 mm/s to 550 mm/s, a low-viscosity base oil (A2) having a kinematic viscosity at 40° C. of 5.0 mm/s to 110 mm/s, and an ultra-high viscosity hydrocarbon-based synthetic oil (A3) having a number average molecular weight (Mn) of 2,500 to 4,500 and a kinematic viscosity at 40° C. of 25,000 mm/s to 50,000 mm/s. The base oil (A) may have a kinematic viscosity at 40° C. of 25 mm/s to 105 mm/s and a viscosity index of 120 or more. Both low-temperature characteristics and a lubricating life can be achieved.