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. 23, 2002
Filed:
Oct. 23, 1997
Tadashi Katafuchi, Ichihara, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A lube oil composition which is suitably used for diesel engines which exhaust large amounts of sulfur dioxides (So ). The composition exhibit excellent corrosion/wear preventive properties against SO . The lube oil composition of the invention for diesel engines includes a lube oil base having a kinematic viscosity of 8-35 mm /s at 100° C.; a component (A) which is a compound selected from the group consisting of over based sulfonates of alkaline earth metals, over based phenates of alkaline earth metals, and over based salicylates of alkaline earth metals; and a component (B) which is a bis-type succinic imide compound having an absorption ratio, &agr;/&bgr; (wherein &agr; is the intensity of an absorption peak at 1550±10 cm and &bgr; is the intensity of an absorption peak at 1700±10 cm ), of absorption peaks in an IR spectrum of not more than 0.005.