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:
Sep. 26, 1978
Filed:
Jul. 08, 1977
Edward Francis Outten, East Brunswick, NJ (US);
Jack Ryer, East Brunswick, NJ (US);
John E Williams, Cranford, NJ (US);
Exxon Research & Engineering Co., Linden, NJ (US);
Abstract
A fluid having a mineral lubricating oil base and containing the combination of an oil-soluble tris (C.sub.8 -C.sub.24 hydrocarbyl) phosphite ester and an oil-soluble C.sub.8 -C.sub.24 hydrocarbyl substituted phenol, the weight ratio of said phosphite to said phenol ranging from about 4:1 to 1:4, preferably 3:1 to 1:3 whereby elastomer compatibility of said fluid is enhanced. The phosphite ester-substituted phenol combination imparts to the fluid the property of maintaining the chemical and physical properties of seals under oxidizing condition in automatic transmissions, power transmissions and power steering systems and thereby improves retention of the fluid in these mechanical structures; preferably when at least an inhibitory amount of an anti-oxidant capable of trapping free radicals at temperatures above 65.degree. C., preferably 80 .degree. to 200.degree. C. is present.