Patents by Inventor Tetsuo Asanuma

Tetsuo Asanuma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for cleaning oil-deposited material
    Patent number: 5399203
    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.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: March 21, 1995
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Makoto Ishikawa, Tetsuhiro Yamauchi, Kazunari Takahashi, Soichi Orita, Tetsuo Asanuma, Noboru Ueki, Masayuki Hattori, Satoshi Yamazaki