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:
Aug. 10, 2010
Filed:
Jul. 17, 2006
Saleem Al-ahmad, Euclid, OH (US);
Melody Wilk, Timberlake, OH (US);
Jack Kelley, Chagrin Falls, OH (US);
John K. Pudelski, Cleveland Heights, OH (US);
Paul E. Adams, Kirtland, OH (US);
Ewa Bardasz, Mentor, OH (US);
Saleem Al-Ahmad, Euclid, OH (US);
Melody Wilk, Timberlake, OH (US);
Jack Kelley, Chagrin Falls, OH (US);
John K. Pudelski, Cleveland Heights, OH (US);
Paul E. Adams, Kirtland, OH (US);
Ewa Bardasz, Mentor, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
An internal combustion engine with a catalyst-containing exhaust-gas aftertreatment device is lubricated with a composition of a base oil; and a zinc salt of a mixture of phosphorus-containing compounds having hydrocarbyl groups Rand Rwhere the average total number of carbon atoms in Rplus Rfor the mixture of phosphorus-containing compounds is at least 9.5, where 4 to 30 weight percent of such groups contain 2 to 4 carbon atoms and where in less than 8 mole percent of the phosphorus-containing molecules in the mixture of phosphorus-containing compounds each of Rand Rcontain 2 to 4 carbon atoms.