Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Eitaro Morita0
Date of Patent
May 13, 2008
0Patent Application Number
107973860
Date Filed
March 10, 2004
0Patent Primary Examiner
Patent abstract
Lubricating oil compositions particularly suitable for automatic transmissions comprising a lubricating base oil, (A) a boron-containing ashless dispersant in an amount of 0.02 to 0.1 percent by mass in terms of boron, based on the total mass of the composition, (B) an alkaline earth metal-based detergent with a base number of 0 to 500 mgKOH/g in an amount of 0.01 percent by mass or more in terms of alkaline earth metal, based on the total mass of the composition, and (C) an alkali metal borate or a hydrate thereof and having excellent anti-wear properties and improved fatigue life by inhibiting pitching.
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