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:
Jan. 19, 1993
Filed:
Mar. 31, 1988
Applicant:
Inventors:
Edward F Zaweski, Baton Rouge, LA (US);
Scott A Culley, Baton Rouge, LA (US);
Assignee:
Ethyl Petroleum Additives, Inc., Richmond, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 47 ; 252 475 ; 252402 ;
Abstract
An additive for improving the antioxidation properties of lubricating oil is made by reacting a sulfur halide selected from sulfur monochloride or sulfur dichloride with an aliphatic monoolefin (e.g. isobutene) to form an adduct, reacting the adduct thus formed with an alkali metal salt of an organocarbamodithioic acid in an aqueous alkanol medium and recovering the reaction product. When added to lubricating oil, the additive products of the invention improve the antioxidation properties of the lubricating oil.