Patents by Inventor Tohru Sugitani

Tohru Sugitani 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).

  • Diffusion film, electrode having the diffusion film, and process for producing diffusion film
    Patent number: 7326488
    Abstract: A diffusion membrane contains uncalcined polytetrafluoroethylene (PTFE), calcined PTFE and a conductive substance. An electrode has the diffusion layer (membrane) and a catalyst layer disposed thereon. A process for producing diffusion membranes comprises dispersing uncalcined PTFE, calcined PTFE and a conductive substance in a dispersion medium, removing the dispersion medium, adding a liquid lubricant followed by kneading, compressing the resultant kneaded product (preferably a rod-shaped preform) to expand the same into a membrane, and removing the liquid lubricant. The diffusion membrane preferably contains 1 to 30 wt % of the uncalcined PTFE and 5 to 30 wt % of the calcined PTFE. The conductive substance is desirably a combination of graphite and carbon black. The diffusion membrane is free from local variation in properties, has suitable mass producibility and can be produced inexpensively.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: February 5, 2008
    Assignee: Nippon Valqua Industries, Ltd.
    Inventors: Michinao Hayashi, Tohru Sugitani, Yoshitaka Asano
  • Diffusion film, electrode having the diffusion film, and process for producing diffusion film
    Publication number: 20050173244
    Abstract: A diffusion membrane contains uncalcined polytetrafluoroethylene (PTFE), calcined PTFE and a conductive substance. An electrode has the diffusion layer (membrane) and a catalyst layer disposed thereon. A process for producing diffusion membranes comprises dispersing uncalcined PTFE, calcined PTFE and a conductive substance in a dispersion medium, removing the dispersion medium, adding a liquid lubricant followed by kneading, compressing the resultant kneaded product (preferably a rod-shaped preform) to expand the same into a membrane, and removing the liquid lubricant. The diffusion membrane preferably contains 1 to 30 wt % of the uncalcined PTFE and 5 to 30 wt % of the calcined PTFE. The conductive substance is desirably a combination of graphite and carbon black. The diffusion membrane is free from local variation in properties, has suitable mass producibility and can be produced inexpensively.
    Type: Application
    Filed: December 13, 2002
    Publication date: August 11, 2005
    Inventors: Michinao Hayashi, Tohru Sugitani, Yoshitaka Asano
  • Method for treatment of inflammation
    Patent number: 4491592
    Abstract: A method for treatment of inflammation is disclosed which utilizes 3,7,11,15-tetramethyl-2,4,6,10,14-hexadecapentaenoic acid represented by the following chemical structural formula: ##STR1## or a salt thereof, as the active ingredient.
    Type: Grant
    Filed: October 18, 1983
    Date of Patent: January 1, 1985
    Assignee: Eisai Co., Ltd.
    Inventors: Yoshinori Katoh, Tetsuya Tajima, Isao Yamatsu, Takeshi Suzuki, Shinya Abe, Akiharu Kajihara, Tohru Sugitani