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. 01, 2022
Filed:
Apr. 19, 2017
Applicant:
The Lubrizol Corporation, Wickliffe, OH (US);
Inventors:
Daniel J. Knapton, Wickliffe, OH (US);
David Cressey, Belper, GB;
Daniel C. Visger, Wickliffe, OH (US);
Assignee:
The Lubrizol Corporation, Wickliffe, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M 149/06 (2006.01); C10N 30/04 (2006.01); C10N 30/10 (2006.01); C10N 30/12 (2006.01); C10N 40/08 (2006.01); C10N 30/00 (2006.01);
U.S. Cl.
CPC ...
C10M 149/06 (2013.01); C10M 2201/085 (2013.01); C10M 2203/003 (2013.01); C10M 2203/1006 (2013.01); C10M 2203/1025 (2013.01); C10M 2209/084 (2013.01); C10M 2209/086 (2013.01); C10M 2217/06 (2013.01); C10M 2223/045 (2013.01); C10N 2030/04 (2013.01); C10N 2030/10 (2013.01); C10N 2030/12 (2013.01); C10N 2030/24 (2020.05); C10N 2030/40 (2020.05); C10N 2040/08 (2013.01);
Abstract
A hydraulic fluid includes an oil of lubricating viscosity and at least 2 wt. % of an ester of a carboxy group-containing interpolymer comprising units derived from a vinyl aromatic monomer and units derived from a carboxylic acid monomer. The interpolymer also contains nitrogen functionality. The hydraulic fluid is at least substantially free of polyacrylates and polymethacrylates.