Patents by Inventor Hajime Suenaga

Hajime Suenaga 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).

  • Hollow-fiber membrane element and membrane module for forward osmosis
    Patent number: 10029212
    Abstract: A hollow-fiber membrane element for forward osmosis which is a both open-ended hollow-fiber membrane element in which both ends of a wound hollow-fiber membrane body are opened, the wound hollow-fiber membrane body having hollow-fiber membranes arranged in an intersecting manner by winding the hollow-fiber membranes around a porous distribution pipe in a helical manner, wherein a) the number of winds per element length in a region from the outermost layer of the wound hollow-fiber membrane body to at least one eighth of the thickness of the wound hollow-fiber membrane body is 0.33 to 1.75, and b) the number of winds per element length in a region from the innermost layer of the wound hollow-fiber membrane body to at least one fourth of the thickness of the wound hollow-fiber membrane body is greater than 1.75.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: July 24, 2018
    Assignee: TOYOBO CO., LTD.
    Inventors: Katsushige Marui, Koji Tokunaga, Yasuki Terashima, Hajime Suenaga, Atsuo Kumano
  • HOLLOW-FIBER MEMBRANE ELEMENT AND MEMBRANE MODULE FOR FORWARD OSMOSIS
    Publication number: 20160207000
    Abstract: A hollow-fiber membrane element for forward osmosis which is a both open-ended hollow-fiber membrane element in which both ends of a wound hollow-fiber membrane body are opened, the wound hollow-fiber membrane body having hollow-fiber membranes arranged in an intersecting manner by winding the hollow-fiber membranes around a porous distribution pipe in a helical manner, wherein a) the number of winds per element length in a region from the outermost layer of the wound hollow-fiber membrane body to at least one eighth of the thickness of the wound hollow-fiber membrane body is 0.33 to 1.75, and b) the number of winds per element length in a region from the innermost layer of the wound hollow-fiber membrane body to at least one fourth of the thickness of the wound hollow-fiber membrane body is greater than 1.75.
    Type: Application
    Filed: October 21, 2014
    Publication date: July 21, 2016
    Applicant: TOYOBO CO., LTD.
    Inventors: Katsushige Marui, Koji Tokunaga, Yasuki Terashima, Hajime Suenaga, Atsuo Kumano