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:
Apr. 22, 2003
Filed:
Nov. 20, 1998
Applicant:
Inventors:
William Frank King, Novato, CA (US);
Curtis Bay Campbell, Hercules, CA (US);
Olivier Clement, Le Havre, FR;
Jean-Louis Le Coent, Le Havre, FR;
Steven Gale Lockett, San Rafael, CA (US);
Richard James Nelson, Pinole, CA (US);
Pierre Tequi, St. Romain de Colbosc, FR;
Assignee:
Chevron Chemical S.A., , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C07C / ;
U.S. Cl.
CPC ...
C10M / ; C07C / ;
Abstract
Low overbased alkaline earth metal alkylaryl sulfonate having a Total Base Number of from about 2 to about 30, a dialkylate content of 0% to about 25% and a monoalkylate content of about 75% to about 90% or more, wherein the alkylaryl moiety is alkyltoluene or alkylbenzene in which the alkyl group is a C -C branched chain alkyl group derived from a propylene oligomer are useful as lubricating oil additives.