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:
Jun. 21, 1977
Filed:
May. 29, 1975
Applicant:
Inventors:
Kensuke Sugiura, Kawasaki, JA;
Mineo Kagaya, Yokohama, JA;
Tokuo Fujisou, Kawasaki, JA;
Hiroyuki Aoki, Urawa, JA;
Takeichiro Takehara, Yokohama, JA;
Shigenori Kurata, Yokohama, JA;
Assignees:
Nippon Oil Company, Ltd., Tokyo, JA;
Nissan Motor Co., Ltd., BOTH OF, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 / ; 252 59 ; 252 73 ; 252 79 ;
Abstract
A central system fluid composition composed of 5-30% by weight of a viscosity index improver, up to 10% by weight of another additive, and the balance being a hydrocarbon-type base oil, which is characterized in that the hydrocarbon-type base oil is composed of 50-100% by weight, based on its total weight, of at least one chief base oil component selected from the group consisting of