Patents by Inventor Masayoshi Okamura

Masayoshi Okamura 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 analyzing nitrogen contained in titanium group metal or alloy thereof
    Patent number: 4746617
    Abstract: A method of quantitatively analyzing nitrogen contained in titanium group metal or an alloy thereof, involving melting the metal or alloy in an inert gas atmosphere, allowing the nitrogen in titanium to be extracted and subjecting the extracted nitrogen to a quantitative analysis, characterized in that a titanium sample for analysis is melted in the present of nickel in an amount corresponding to 7 to 16 times the weight of the sample.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: May 24, 1988
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Masayoshi Okamura, Kiyoshi Matsuda, Hiromichi Yamada, Hiromi Umeda, Masami Tomimoto
  • Method of analyzing oxygen or nitrogen contained in titanium group metal or alloy thereof
    Patent number: 4673655
    Abstract: A method of quantitatively analyzing oxygen or nitrogen contained in titanium group metal or an alloy thereof, involving melting the metal or alloy in an inert gas atmosphere, allowing the oxygen in titanium to react with carbon thereby extracting it as carbon monoxide, or allowing the nitrogen in titanium to be extracted, and subjecting the extracted carbon monoxide or nitrogen to a quantitative analysis, characterized in that a titanium sample for analysis is melted in the present of nickel in an amount corresponding to 7 to 17 times the weight of the sample.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: June 16, 1987
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Masayoshi Okamura, Kiyoshi Matsuda, Hiromichi Yamada, Hiromi Umeda, Masami Tomimoto
  • Process for producing oligoesters
    Patent number: 4560788
    Abstract: A process for producing an oligoester which comprises:(a) the step of reacting isophthalic acid and propylene oxide in a reaction medium in the presence of a specific catalyst comprising a tetraalkyl ammonium compound to prepare an oligoester, and(b) the step of removing volatile components from the resulting oligoester by heating the oligoester at a temperature of 180.degree.-280.degree. C. is disclosed. The oligoester is used as an intermediate for preparing unsaturated polyesters.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: December 24, 1985
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Akira Miyamoto, Senzo Shimizu, Masayoshi Okamura, Hiroka Tanisake, Yasumitsu Higuchi, Toshio Hidaka, Koji Yamamoto, Toshiyuki Abe