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:
Dec. 13, 1994
Filed:
Apr. 12, 1993
Kouzou Kamiya, Yokohama, JP;
Isao Honjo, Yokohama, JP;
Toshio Yoshida, Yokohama, JP;
Masaru Ushio, Yokohama, JP;
Jinichi Igarashi, Yokohama, JP;
Masakuni Hirata, Yokohama, JP;
Mitsuo Okada, Yokohama, JP;
Yuji Ikemoto, Yokohama, JP;
Kouichi Oshima, Yokohama, JP;
Hiroyuki Takashima, Yokohama, JP;
Nippon Oil Co., Ltd., , JP;
Abstract
Lubricant base oils are made up essentially of 2-15% by weight of a total aromatics content, greater than 60% by weight of isoparaffins and monocyclic naphthenes in total, more than 30% by weight of alkylbenzenes in the total aromatics content and smaller than 4% by weight of tricyclic and tetracyclic aromatics in the total aromatics content. The base oil has great viscosity index, small pour point, high oxidative stability and heat stability and sufficient capability to dissolve sludge.