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:
Apr. 02, 2024
Filed:
Apr. 01, 2021
Shell Usa, Inc., Houston, TX (US);
Hiroshi Kaneko, Tokyo, JP;
SHELL USA, INC., Houston, TX (US);
Abstract
The present invention provides a water/glycol-based hydraulic fluid that includes a total fatty acid and dimer acid of more than 0.4 and no more than 1.2 mass % as a fatty acid lubricant, and also a phosphate ester at between 0.01 and 0.07 mass %. The phosphate ester has the following structure (1) here R1 and R2 each represent a hydrogen atom or a hydrogen group with a carbon number between 1 and 30, and may either be mutually identical or mutually different; Rrepresents a hydrocarbon group with a carbon number between 1 and 20; Rrepresents a hydrogen atom or a hydrocarbon group with a carbon number between 1 and 30; and X, X, X, and Xeach indicate an oxygen atom or a sulfur atom, where these may either be mutually identical or mutually different.