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:
Aug. 09, 2011
Filed:
Jun. 26, 2006
Masahiro Kobessho, Kanagawa, JP;
Katsumi Ichitani, Chiba, JP;
Makoto Takeishi, Chiba, JP;
Yasuyuki Fujiwara, Aichi, JP;
Yoshimi Aoyama, Aichi, JP;
Masahiro Kobessho, Kanagawa, JP;
Katsumi Ichitani, Chiba, JP;
Makoto Takeishi, Chiba, JP;
Yasuyuki Fujiwara, Aichi, JP;
Yoshimi Aoyama, Aichi, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
The heat-treating oil composition of the present invention is characterized by comprising a mixed base oil containing a low-boiling base oil having a 5% distillation temperature of from 300 to 400° C. in an amount of not less than 5% by mass but less than 50% by mass, and a high-boiling base oil having a 5% distillation temperature of 500° C. or higher in an amount of more than 50% by mass but not more than 95% by mass. There is provided a quenching oil composition capable of exhibiting a less fluctuation in hardness or quenching distortion of a metal material treated therewith even when a large number of the metal materials are quenched therewith at the same time.