Patents by Inventor Tadashi Katabuchi

Tadashi Katabuchi 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 of quenching metals
    Patent number: 4465523
    Abstract: A method of quenching metals is described, comprising immersing said metals in a quenching oil composition comprising: (a) a base oil, and (b) a compound represented by the general formula (1) or (2) as described below. ##STR1## (wherein all the symbols are the same as defined in the claims). The use of the quenching oil composition results in the formation of a black coating layer on the metal, producing those metallic articles having improved characteristics, such as good lubricity and rust preventive properties.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: August 14, 1984
    Assignee: Idemitsu Kosan Company Limited
    Inventor: Tadashi Katabuchi