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:
Jan. 12, 1999
Filed:
Oct. 06, 1997
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
Lubricating oil composition for internal combustion engines includes a base oil containing (A) 30-98% by weight of a mineral oil having a kinematic viscosity of 2-30 mm.sup.2 /sec at 100.degree. C. and a viscosity index of not less than 100 and (B) 2-70% by weight of poly-.alpha.-olefin, and zinc dithiophosphate in an amount corresponding, as reduced to the amount of P (phosphorus), to 0.02-0.15 parts by weight with respect to 100 parts by weight of the base oil. The composition of the present invention is advantageously used as lubricating oil composition for internal combustion engines, exerting excellent effects in terms of the consumption of the oil composition, fuel consumption rate, and sealing characteristics of rubber.