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:
Feb. 08, 1977
Filed:
Oct. 15, 1974
Martin B Sheratte, Canoga Park, CA (US);
McDonnell Douglas Corporation, Long Beach, CA (US);
Abstract
A functional fluid composition consisting essentially of (1) a phosphorus compound, preferably a phosphate ester containing at least two alkyl groups such as tributyl phosphate or di-n-butyl phenyl phosphate, alone or particularly in combination with a phosphate ester containing at least two aromatic groups, such as n-butyl diphenyl phosphate or tricresyl phosphate, (2) a polyalkylene glycol material, e.g. a polypropylene glycol ether having a molecular weight ranging from about 600 to about 1200, and particularly a combination of at least two polyalkylene glycol materials, e.g. two polypropylene glycol ethers having substantially different molecular weights, and (3) a small amount of certain halogenated organic selenides or tellurides, preferably a chlorinated aryl selenide such as 4,4'-dichlorodiphenyl diselenide, or a chlorinated selenophene or a chlorinated tellurophene, e.g. tetrachloroselenophene or tetrachlorotellurophene.