Patents by Inventor Hiroyuki Kudomi

Hiroyuki Kudomi 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 preparing water-soluble, partially-hydrolyzed, solid acrylamide polymer
    Patent number: 4482682
    Abstract: A partially-hydrolyzed, solid acrylamide polymer is prepared by bringing a hydrous gel of a water-soluble acrylamide polymer into contact with an aqueous caustic alkali solution, maintaining the polymer at an elevated temperature and under highly humid conditions to hydrolyze certain amido groups of the water-soluble acrylamide polymer and then drying the thus partially-hydrolyzed acrylamide polymer. The resultant polymer contains less water-insoluble components and hardly forms precipitate even in salt water containing calcium ions. It can be suitably used for coagulation of suspension and in secondary oil recovery.
    Type: Grant
    Filed: March 23, 1983
    Date of Patent: November 13, 1984
    Assignee: Mitsubishi Chemical Industries, Limited
    Inventors: Hiroyuki Kudomi, Shinichi Sato
  • Method of producing partially hydrolyzed acrylamide polymers
    Patent number: 4146690
    Abstract: Acrylamide polymers or copolymers are partially hydrolyzed by mixing the particles of hydrous gel of the polymer in an apparatus which has a mixing mechanism comprising of blades having a blank space and the face of the apparatus where the polymer is contacted with is made of or coated with synthetic resin.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: March 27, 1979
    Assignees: Mitsubishi Chemical Industries, Ltd., Kyoritsu Yuki Co., Ltd.
    Inventors: Atsuo Tago, Hiroyuki Kudomi, Yasuyuki Nakanishi