Patents by Inventor Katsumasa Mito

Katsumasa Mito 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 recovering etchant from etching waste liquid containing iron chloride
    Patent number: 5954854
    Abstract: Method for recovering etchant from etching waste liquid 11 containing iron chloride is disclosed, wherein iron powder is mixed with iron chloride waste solution containing metal ions having a lesser ionization tendency than iron ion in an mixing vessel so as to cause a reaction between the iron powder and the metal ions and remove the precipitated metal from the iron chloride waste solution.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: September 21, 1999
    Assignee: Astec Irie Co., Ltd.
    Inventors: Tsutomu Inoshita, Tadao Kitazawa, Hiroyuki Matsumoto, Masaki Nagashima, Hiroshi Yoshino, Yonejiro Nagaoka, Katsumasa Mito