Patents by Inventor Shuichi Yokoyama

Shuichi Yokoyama 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).

  • Method for producing human corneal epithelium sheet
    Patent number: 10335439
    Abstract: [Problem] To provide a method for producing human corneal epithelial sheet, wherein the human corneal epithelial-derived cells obtained by culturing human corneal epithelial cells are cultured on an amnion substrate. [Solution] A method for culturing human corneal epithelial cells using mesenchymal stem cells as the feeder cells; and a method for culturing human corneal epithelial cells using a medium containing a ROCK inhibitor, a phosphodiesterase inhibitor, a MAP kinase inhibitor and a TGF-? receptor inhibitor in various combinations.
    Type: Grant
    Filed: March 9, 2014
    Date of Patent: July 2, 2019
    Assignees: JCR Pharmaceuticals Co., Ltd., Kyoto Prefectural Public University Corporation
    Inventors: Kiwamu Imagawa, Kenichi Maeda, Yuki Hosoda, Shuichi Yokoyama, Naoki Okumura, Noriko Koizumi, Shigeru Kinoshita
  • METHOD FOR PRODUCING HUMAN CORNEAL EPITHELIUM SHEET
    Publication number: 20160008408
    Abstract: [Problem] To provide a method for producing human corneal epithelial sheet, wherein the human corneal epithelial-derived cells obtained by culturing human corneal epithelial cells are cultured on an amnion substrate. [Solution] A method for culturing human corneal epithelial cells using mesenchymal stem cells as the feeder cells; and a method for culturing human corneal epithelial cells using a medium containing a ROCK inhibitor, a phosphodiesterase inhibitor, a MAP kinase inhibitor and a TGF-? receptor inhibitor in various combinations.
    Type: Application
    Filed: March 9, 2014
    Publication date: January 14, 2016
    Applicants: JCR PHARMACEUTICALS CO., LTD., KYOTO PREFECTURAL PUBLIC UNIVERSITY CORPORATION
    Inventors: Kiwamu IMAGAWA, Kenichi MAEDA, Yuki HOSODA, Shuichi YOKOYAMA, Naoki OKUMURA, Noriko KOIZUMI, Shigeru KINOSHITA
  • Toner for development of electrostatic image
    Patent number: 6562535
    Abstract: A toner for development of electrostatic images, comprising at least a binder resin, a colorant and a charge control agent, wherein the charge control agent contains a positive charge control resin (A) composed of a polymer having a weight average molecular weight of 1,000 to 100,000 and a functional group which brings positively charging ability, and a negative charge control resin (B) composed of a polymer having a weight average molecular weight of 1,000 to 100,000 and a functional group which brings negatively charging ability. The toner is excellent in flowability, shelf stability and charge properties, and provides images excellent in image quality.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: May 13, 2003
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Kojiro Masuo, Shuichi Yokoyama, Takuji Kishimoto, Kazu Niwa