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. 20, 1976
Filed:
Sep. 24, 1973
Martin B Sheratte, Reseda, CA (US);
McDonnell Douglas Corporation, Long Beach, CA (US);
Abstract
Novel functional fluid compositions consisting essentially of (1) a phosphate ester, e.g. dibutyl phenyl phosphate, or an amide of an acid of phosphorus, (2) a polyglycol or polyglycol ether viscosity index improver, e.g. polypropylene glycol methyl ether of molecular weight about 3,000, and (3) a small amount of a polyepoxide, e.g. an epoxy novolac of high epoxide functionality, the combination of polyglycol or polyglycol ether viscosity index improver and polyepoxide preventing acid build-up in the fluid, and preventing excessive deposits particularly when such fluid is employed as an aircraft hydraulic fluid.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile