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:
Jul. 22, 1980
Filed:
Apr. 17, 1978
Applicant:
Inventors:
John M Larkin, Austin, TX (US);
William P Cullen, Fishkill, NY (US);
Rodney L Sung, Fishkill, NY (US);
Benjamin H Zoleski, Beacon, NY (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
544277 ; 544347 ; 546182 ; 546255 ; 568 23 ; 568 40 ;
Abstract
Lubricating oil additives, including the calcium salts of sulfurized alkylphenols and dispersants consisting of the reaction products of halogenated polyalkylenes and heterocyclic amines, are substantially decolorized by treatment with small amounts of alkali metal hydrides in a polar solvent at 20.degree. to 120.degree. C. Color improvement is obtained at concentrations ranging from 1 to 75 parts of an alkali metal hydride per 1000 parts of additive.