Patents by Inventor Masami Kuroki

Masami Kuroki 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 and apparatus for producing a high-purity titanium
    Patent number: 5336378
    Abstract: A sputtering target for forming a thin film consisting of high-purity titanium, in which the content of alkali metal is 0.1 ppm or less, the content of radio active elements is 1 ppb or less, and the oxygen content is 100 ppm or less, and, further, the balance of the elements is Ti, is produced by a fused salt electrolysis, in which the members of the electrolytic cell being in contact with the fused salt consist of Ni.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: August 9, 1994
    Assignee: Japan Energy Corporation
    Inventors: Eiji Nishimura, Masami Kuroki, Naoyuki Kikutake, Yuuichiro Shindou
  • 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
  • Process and apparatus for producing zirconium sponge
    Patent number: 4105192
    Abstract: Apparatus and method for producing zirconium by reducing zirconium halides in the presence of a reducing agent and an inert gas. The zirconium halide is mostly reduced while being in the solid state. The apparatus permits successive reduction and vaccum distillation in one batch.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: August 8, 1978
    Assignee: Nippon Mining Company
    Inventors: Kazuhiko Ishimatsu, Takao Nakahara, Akira Murata, Masami Kuroki