Patents by Inventor Katsuhide Yamazaki

Katsuhide Yamazaki 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).

  • Liquid preparation for contact lenses comprising hydrolyzed hyaluronic acid derivative and cationic bactericide
    Patent number: 10525159
    Abstract: The present invention relates to a liquid preparation for soft contact lenses, particularly hydrogel contact lenses or silicone hydrogel contact lenses. The liquid preparation for contact lenses according to the present invention contains a hydrolyzed hyaluronic acid derivative having a monoether of a linear or branched alkyl group or alkenyl group having 6 or more and 20 or less carbon atoms and glycerol in a side chain. The liquid preparation for soft contact lenses according to the present invention may contain at least one cationic bactericide selected from the group consisting of an alexidine salt, a chlorhexidine salt, a polyhexamethylene biguanide salt and a quaternary ammonium salt. The liquid preparation for soft contact lenses according to the present invention is capable of suppressing adsorption of a cationic bactericide to soft contact lenses, and suppressing occurrence of corneal staining in a wearer.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 7, 2020
    Assignee: OPHTECS CORPORATION
    Inventors: Katsuhide Yamazaki, Haruki Nakagawa
  • LIQUID PREPARATION FOR CONTACT LENSES COMPRISING HYDROLYZED HYALURONIC ACID DERIVATIVE AND CATIONIC BACTERICIDE
    Publication number: 20190142990
    Abstract: The present invention relates to a liquid preparation for soft contact lenses, particularly hydrogel contact lenses or silicone hydrogel contact lenses. The liquid preparation for contact lenses according to the present invention contains a hydrolyzed hyaluronic acid derivative having a monoether of a linear or branched alkyl group or alkenyl group having 6 or more and 20 or less carbon atoms and glycerol in a side chain. The liquid preparation for soft contact lenses according to the present invention may contain at least one cationic bactericide selected from the group consisting of an alexidine salt, a chlorhexidine salt, a polyhexamethylene biguanide salt and a quaternary ammonium salt. The liquid preparation for soft contact lenses according to the present invention is capable of suppressing adsorption of a cationic bactericide to soft contact lenses, and suppressing occurrence of corneal staining in a wearer.
    Type: Application
    Filed: May 26, 2016
    Publication date: May 16, 2019
    Applicant: OPHTECS CORPORATION
    Inventors: Katsuhide Yamazaki, Haruki Nakagawa