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:
Dec. 20, 2011
Filed:
Apr. 03, 2008
Ramanathan Ravichandran, Suffern, NY (US);
Farouk Abi-karam, Wilton, CT (US);
Alena Yermolenka, Norwalk, CT (US);
Michel Hourani, Brookfield, CT (US);
Ingo Roehrs, Sandy Hook, CT (US);
Ramanathan Ravichandran, Suffern, NY (US);
Farouk Abi-Karam, Wilton, CT (US);
Alena Yermolenka, Norwalk, CT (US);
Michel Hourani, Brookfield, CT (US);
Ingo Roehrs, Sandy Hook, CT (US);
King Industries, Inc., Norwalk, CT (US);
Abstract
This invention relates to lubricating oil additives, and to lubricating oil compositions, their method of preparation, and use. More specifically, this invention relates to several novel lubricating oil additives and compositions which contain a tungsten compound and an antioxidant, namely aminic antioxidants such as a secondary diarylamine or an alkylated phenothiazine. The use of the tungsten compound with the secondary diarylamine and/or the alkylated phenothiazine provides improved oxidation and deposit control to lubricating oil compositions. The lubricating oil compositions of this invention are particularly useful as crankcase and transmission lubricants, gear oils and other high performance lubricant applications.