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:
May. 16, 1978
Filed:
Apr. 01, 1976
Warren Lowe, El Cerrito, CA (US);
Chevron Research Company, San Francisco, CA (US);
Abstract
A lubricating oil additive composition which imparts improved oxidaton properties to crankcase lubricants comprises an antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and a primary amine of the formula: ##STR1## wherein each A is independently hydrogen or alkyl, R is alkyl or alkenyl of at least 6 carbon atoms, R.sup.1 is an alkyl group of at least 2 carbon atoms, x is an integer from 2 to 4, y is 1 to 4, and Het forms with the N atom, a 5- or 6-membered heterocyclic ring optionally containing an additional N or O hetero atom. Lubricating oil compositions containing this additive composition are also disclosed. Zn dithiophosphates may, also, be used in the additive composition.