Patents by Inventor Hideo Ohki

Hideo Ohki 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).

  • Process for producing 1,3-di-(2-hydroperoxy-2-propyl) benzene
    Patent number: 5962747
    Abstract: A process for producing 1,3-di-(2-hydroperoxy-2-propyl)benzene comprising an oxidizing step, an extracting step with an aqueous solution and a recycling step wherein the accumulated equilibrium concentration of 1,3-di-(2-hydroxy-2-propyl)benzene in the circulating oil obtained by an extracting step with an aqueous solution is 4.2% by weight or less. The process enables to avoid inconveniences like occlusion of inside space of an apparatus and failure of detection of measuring machines and allows continuous safe operation.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: October 5, 1999
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Shigefumi Tokumasu, Hideo Ohki, Toshikazu Ohmae
  • Process for the extraction of hydroperoxides
    Patent number: 5959155
    Abstract: A process for extraction of hydroperoxides wherein 1,3-di-(2-hydroperoxy-2-propyl)benzene and 3-(2-hydroxy-2-propyl)-1-(2-hydroperoxy-2-propyl)benzene are extracted from a raw solution comprising 1,3-di-(2-hydroperoxy-2-propyl)benzene, 3-(2-hydroxy-2-propyl)-1-(2-hydroperoxy-2-propyl)benzene and an aqueous sodium hydroxide solution, said process using methyl isobutyl ketone containing not more than 10 ppm by weight of a phenol or phenols as a solvent for extraction.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: September 28, 1999
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshikazu Ohmae, Shigefumi Tokumasu, Hideo Ohki
  • Particle-packed fiber article having antibacterial property
    Patent number: 4525410
    Abstract: Specific zeolite particles retaining therein a metal ion having a bactericidal activity are packed and retained in a mixed fiber assembly composed of low-melting thermoplastic synthetic fibers and ordinary fibers. The zeolite particles are retained by welding of the low-temperature thermoplastic synthetic fibers but in a state of allowing the contact thereof with an external fluid. The particle-packed fiber article has an excellent and durable antibacterial activity and can be used in various fields.
    Type: Grant
    Filed: August 24, 1983
    Date of Patent: June 25, 1985
    Assignees: Kanebo, Ltd., Kanto Chemical Co., Inc.
    Inventors: Zenji Hagiwara, Hideo Ohki, Shigetaka Hoshino, Saburo Nohara, Shunya Ida, Kenichi Tagawa