Patents by Inventor Kenji Okui

Kenji Okui 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).

  • Polytetrafluoroethylene production method
    Patent number: 11952441
    Abstract: A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: April 9, 2024
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Taketo Kato, Yohei Fujimoto, Kenji Ichikawa, Hiroyuki Sato, Yoshinori Nanba, Hirotoshi Yoshida, Kengo Ito, Chiaki Okui, Masamichi Sukegawa, Taku Yamanaka
  • Eyeglasses
    Patent number: 6460996
    Abstract: Eyeglasses include a right and a left rim member connected with a bridge. A groove extends from an inside area to an upper and lower areas of each of the rim members, and a lens is inserted in the groove at its inside, upper and lower edges. The lens is slidable laterally outwards to be detached from the rim member and inwards to be fitted therein. Therefore the lens can be easily changed, but not prone to come off inadvertently.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: October 8, 2002
    Assignee: Yamamoto Kogaku Co., Ltd.
    Inventors: Kenji Okui, Kazuto Yasuhara
  • EYEGLASSES
    Publication number: 20020109818
    Abstract: Eyeglasses include a right and a left rim member connected with a bridge. A groove extends from an inside area to an upper and lower areas of each of the rim members, and a lens is inserted in the groove at its inside, upper and lower edges. The lens is slidable laterally outwards to be detached from the rim member and inwards to be fitted therein. Therefore the lens can be easily changed, but not prone to come off inadvertently.
    Type: Application
    Filed: January 22, 2002
    Publication date: August 15, 2002
    Inventors: Kenji Okui, Kazuto Yasuhara