Patents by Inventor Hirohisa Umemoto

Hirohisa Umemoto 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).

  • Water electrolysis method and water electrolysis device
    Patent number: 11421327
    Abstract: Provided are a water electrolysis method and a water electrolysis device in which mixing of the generated hydrogen and oxygen is greatly reduced and which have a high electrolysis efficiency, while being simplified in structure. In the water electrolysis method and water electrolysis device, water is electrolyzed by supplying water to the cathode side of an electrolytic membrane including a solid polymer membrane provided with a catalyst layer on a surface thereof and creating a potential difference between both surfaces of the electrolytic membrane. The temperature-controlled water is supplied only to the cathode side of the electrolytic membrane, while controlling the difference in pressure between both surfaces of the electrolytic membrane to 50 kPa or less.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: August 23, 2022
    Assignees: JAPAN AEROSPACE EXPLORATION AGENCY, HITACHI ZOSEN CORPORATION, W.L. GORE & ASSOCIATES G.K.
    Inventors: Yoshitsugu Sone, Masato Sakurai, Naoki Sato, Hirohisa Umemoto, Tetsuya Yoshida, Wataru Ishida, Hiroyoshi Fujimoto
  • WATER ELECTROLYSIS METHOD AND WATER ELECTROLYSIS DEVICE
    Publication number: 20170101717
    Abstract: Provided are a water electrolysis method and a water electrolysis device in which mixing of the generated hydrogen and oxygen is greatly reduced and which have a high electrolysis efficiency, while being simplified in structure. In the water electrolysis method and water electrolysis device, water is electrolyzed by supplying water to the cathode side of an electrolytic membrane including a solid polymer membrane provided with a catalyst layer on a surface thereof and creating a potential difference between both surfaces of the electrolytic membrane. The temperature-controlled water is supplied only to the cathode side of the electrolytic membrane, while controlling the difference in pressure between both surfaces of the electrolytic membrane to 50 kPa or less.
    Type: Application
    Filed: March 26, 2015
    Publication date: April 13, 2017
    Applicants: JAPAN AEROSPACE EXPLORATION AGENCY, Hitachi Zosen Corporation, W.L. Gore & Associates, Co., Ltd.
    Inventors: Yoshitsugu Sone, Masato Sakurai, Naoki Sato, Hirohisa Umemoto, Tetsuya Yoshida, Wataru Ishida, Hiroyoshi Fujimoto