Patents by Inventor Kenzo Takashina

Kenzo Takashina 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).

  • Heat treatment method of steel
    Patent number: 6506270
    Abstract: A heat treatment method of steel is capable of enhancing wear resistance, mechanical properties and dimensional stability of the steel due to the reduction of the retained austenite amount to substantially zero. In the method, an article of the steel is subjected to a quenching and then subzero treatment including cooling it at a cooling rate of 1 to 10° C./min. to a cooling temperature and holding the cooling temperature for a predetermined period of time.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: January 14, 2003
    Assignees: Iwatani International Corporation, MMC Kobelco Tool Co., Ltd.
    Inventors: Kenzo Takashina, Yuji Komori, Kazuaki Tanaka, Masahiro Machida
  • Heat treatment method of steel
    Publication number: 20020017345
    Abstract: A heat treatment method of steel is capable of enhancing wear resistance, mechanical properties and dimensional stability of the steel due to the reduction of the retained austenite amount to substantially zero. In the method, an article of the steel is subjected to a quenching and then subzero treatment including cooling it at a cooling rate of 1 to 10° C./min. to a cooling temperature and holding the cooling temperature for a predetermined period of time.
    Type: Application
    Filed: June 19, 2001
    Publication date: February 14, 2002
    Applicant: IWATANI INTERNATIONAL CORPORATION
    Inventors: Kenzo Takashina, Yuji Komori, Kazuaki Tanaka, Masahiro Machida