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:
Mar. 21, 1995
Filed:
Apr. 15, 1993
Makoto Ishikawa, Yokohama, JP;
Tetsuhiro Yamauchi, Kurashiki, JP;
Kazunari Takahashi, Kurashiki, JP;
Soichi Orita, Kurashiki, JP;
Tetsuo Asanuma, Kurashiki, JP;
Noboru Ueki, Kurashiki, JP;
Masayuki Hattori, Kurashiki, JP;
Satoshi Yamazaki, Kurashiki, JP;
Mitsubishi Kasei Corporation, Tokyo, JP;
Abstract
Disclosed herein are a method of cleaning an oil-deposited material, which comprises cleaning a material having oils deposited on the surface thereof with a cleaning agent comprising 25 to 90% by weight of at least one of compounds selected from the group consisting of pyrrolidones, .gamma.-butyrolactone and N,N-dimethylacetamide, and 10 to 75% by weight of water, then eliminating at least a portion of the deposited cleaning agent from said material to be cleaned by a physical means, and then applying water-washing with water, steam or water and steam; an apparatus for cleaning an oil-deposited materialhaving oils deposited on the surface thereof; and a cleaning agent therefor.