Patents by Inventor Takao Kusakabe

Takao Kusakabe 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 preventing corrosion and hydrogen embrittlement of tantalum-made equipment handling hot concentrated sulphuric acid therein
    Patent number: 4356148
    Abstract: A method for preventing the corrosion and hydrogen embrittlement of equipment made of tantalum handling therein hot concentrated sulphuric acid at 200.degree. C. or higher, characterized in that at least one oxidizer selected from the group consisting of nitric acid, nitrogen oxides, ferric ion, cupric ion, stannic ion or plumbic ion is incorporated in the sulphuric acid.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: October 26, 1982
    Assignee: JGC Corporation
    Inventors: Naohiko Kagawa, Katsumi Yamamoto, Rin Sasano, Takao Kusakabe, Yasuhiro Moriya