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:
Oct. 04, 2011
Filed:
Jun. 01, 2007
Shigeki Matsui, Yokohama, JP;
Hitoshi Komatsubara, Yokohama, JP;
Shigeki Matsui, Yokohama, JP;
Hitoshi Komatsubara, Yokohama, JP;
Nippon Oil Corporation, Tokyo, JP;
Abstract
The present invention provides lubricating oil compositions having excellent anti-wear properties and anti-fatigue properties as well as excellent low temperature fluidity, particularly suitable for automatic transmissions and/or continuously variable transmissions, and internal combustion engines. The compositions comprises (A) a base oil with a kinematic viscosity at 100° C. of 1 to 8 mm/s, a pour point of −15° C. or lower, an aniline point of 100° C. or higher, the saturates of the base oil containing 40 percent by mass or more of paraffins, 25 percent by mass or less of one ring naphthenes, and 35 percent by mass or less of two to six ring naphthenes, as the main component, and (B) 0.005 to 0.4 percent by mass of a metallic detergent, (C) 0.005 to 0.2 percent by mass in terms of nitrogen of a succinimide-type ashless dispersant, (D) 0.005 to 0.2 percent by mass in terms of phosphorus of a phosphorus-containing anti-wear agent, and (E) 0.01 to 20 percent by mass of a viscosity index improver with a weight average molecular weight (Mw) of 50,000 or greater, on the basis of the total amount of the composition.