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. 07, 2025
Filed:
Nov. 09, 2021
Shell Oil Company, Houston, TX (US);
Hiroshi Kaneko, Minato-ku, JP;
Shell USA, Inc., Houston, TX (US);
Abstract
This invention provides a water-glycol hydraulic fluid comprises from 0.2 to 0.6% by mass of a dimer acid as a fatty acid lubricant, and more than 0.10% by mass and 0.20% by mass or less of a phosphoric acid ester of Formula (1), wherein the sum of the dimer acid and the phosphoric acid ester is more than 0.35% by mass wherein Rand Rmay be the same or different, each representing a hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms, Rrepresents a hydrocarbon group having from 1 to 20 carbon atoms, Rrepresents a hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms, and X, X, Xand Xmay be the same or different, each representing an oxygen atom or a sulfur atom.