Patents by Inventor Iwao Kyono

Iwao Kyono 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).

  • High-purity metal and metal silicide target for LSI electrodes
    Patent number: 4770948
    Abstract: There is provided a high-purity molybdenum target or high-purity molybdenum silicide target for LSI electrodes which comprises a high-purity metallic molybdenum having an alkali metal content of not more than 100 ppb and a radioactive element content of not more than 10 ppb. Further, a process is provided for producing such target comprising a wet purification processing followed by a series of dry processings.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: September 13, 1988
    Assignees: Nihon Kogyo Kabushiki Kaisha, Nippon Telegraph and Telephone Corporation
    Inventors: Hideo Oikawa, Takao Amazawa, Nakahachiro Honna, Hideo Miyazaki, Iwao Kyono, Nobuyuki Mori, Yoshiharu Katoh, Masami Kuroki
  • Process for producing high-purity metal targets for LSI electrodes
    Patent number: 4619695
    Abstract: A high-purity high-melting metal target or high-purity high-melting metal silicide target for LSI electrodes having an alkali metal content of not more than 100 ppb and a radioactive element content of not more than 10 ppb is provided by a wet purification process followed by a series of dry processings. Preferably the high-melting metal is molybdenum, tungsten, titanium, niobium or tantalum. More preferably, the high-melting metal is molybdenum.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: October 28, 1986
    Assignees: Nihon Kogyo Kabushiki Kaisha, Nippon Telegraph & Telephone Public Corporation
    Inventors: Hideo Oikawa, Takao Amazawa, Nakahachiro Honma, Hideo Miyazaki, Iwao Kyono, Nobuyuki Mori, Yoshiharu Katoh, Masami Kuroki
  • Method for removal of mercury in sulfur dioxide-containing gas
    Patent number: 3961031
    Abstract: A method for the removal of mercury contained in a sulfur dioxide-containing gas which comprises contacting the sulfur dioxide-containing gas with an aqueous thiourea solution which optionally contains an acid at an acid concentration higher than one normal to selectively absorb mercury in a vapor state.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: June 1, 1976
    Assignee: Nippon Mining Co., Ltd.
    Inventors: Hiroshi Yasui, Iwao Kyono, Hideo Aoki, Haruo Manabe