Patents by Inventor Yoshiharu Tsujita

Yoshiharu Tsujita 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).

  • Adsorbents made of styrene polymers
    Patent number: 6815396
    Abstract: (1) An adsorbent comprising a styrene polymer, which is producing by dissolving a substantially syndiotactic styrene polymer in an organic compound having an affinity for the polymer, followed by shaping it, and thereafter removing the organic compound from the shaped article. (2) For producing the adsorbent (1), the polymer solution is melt-cast into the shaped article. (3) For producing the adsorbent (1) or (2), the organic compound is removed from the shaped article through evaporation under reduced pressure. The adsorbent provided herein is effective for selectively and efficiently adsorbing an organic compound in gases or liquids.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: November 9, 2004
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Yoshiharu Tsujita, Norio Tomotsu
  • Method for controlling membrane permeability by microwave and method for producing organic separation membrane
    Patent number: 6706088
    Abstract: The present invention relates to a method for controlling a permeability of a gas to be separated through an organic separation membrane in a separation process of gasses by an organic separation membrane, wherein the method comprises irradiating the organic separation membrane with a microwave to cause vibration/rotation of a molecule or a domain thereof constituting the organic separation membrane and alter the molecular structure and/or polarity of the organic separation membrane, and thus altering a permeability of the gas to be separated; and also a method for producing an organic separation membrane, comprising irradiating with a microwave in a process of producing the organic separation membrane to alter the permeability thereof.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: March 16, 2004
    Assignee: Nissan Chemical Industries
    Inventors: Yoshiharu Tsujita, Hiroaki Yoshimizu, Misao Miyamoto
  • Method for controlling membrane permeability by microwave and method for producing organic separation membrane
    Publication number: 20030075044
    Abstract: The present invention relates to a method for controlling a permeability of a gas to be separated through an organic separation membrane in a separation process of gasses by an organic separation membrane, wherein the method comprises irradiating the organic separation membrane with a microwave to cause vibration/rotation of a molecule or a domain thereof constituting the organic separation membrane and alter the molecular structure and/or polarity of the organic separation membrane, and thus altering a permeability of the gas to be separated; and also a method for producing an organic separation membrane, comprising irradiating with a microwave in a process of producing the organic separation membrane to alter the permeability thereof,
    Type: Application
    Filed: November 27, 2002
    Publication date: April 24, 2003
    Applicant: Nissan Chemical Industries, Ltd.
    Inventors: Yoshiharu Tsujita, Hiroaki Yoshimizu, Misao Miyamoto