Patents by Inventor Kiyoshi SHOJI

Kiyoshi SHOJI 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).

  • Anionic drug-containing medical device
    Patent number: 10668157
    Abstract: The purpose of the present invention is to provide a polymer gel that can increase drug content ratio and reduce undesirable influence on gel strength and shape stability after the drug release, compared with the conventional techniques. The purpose can be achieved by an anionic drug-containing medical device comprising: (1) an anionic drug; and (2) a copolymer which contains, as constituents, a cationic monomer comprising a condensation product of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth)acrylic acid or a salt of the condensation product and a monomer capable of copolymerizing with the condensation product or the salt of the condensation product.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: June 2, 2020
    Assignees: SEED CO., LTD., SENJU PHARMACEUTICAL CO., LTD.
    Inventors: Haruka Obata, Kiyoshi Shoji, Yoshiko Yamazaki, Toru Matsunaga, Takao Sato, Wakiko Asayama, Shinichi Yasueda
  • ANIONIC DRUG-CONTAINING MEDICAL DEVICE
    Publication number: 20170043017
    Abstract: The purpose of the present invention is to provide a polymer gel that can increase drug content ratio and reduce undesirable influence on gel strength and shape stability after the drug release, compared with the conventional techniques. The purpose can be achieved by an anionic drug-containing medical device comprising: (1) an anionic drug; and (2) a copolymer which contains, as constituents, a cationic monomer comprising a condensation product of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth)acrylic acid or a salt of the condensation product and a monomer capable of copolymerizing with the condensation product or the salt of the condensation product.
    Type: Application
    Filed: April 16, 2015
    Publication date: February 16, 2017
    Applicants: SEED CO., LTD., SENJU PHARMACEUTICAL CO., LTD.
    Inventors: Haruka OBATA, Kiyoshi SHOJI, Yoshiko YAMAZAKI, Toru MATSUNAGA, Takao SATO, Wakiko ASAYAMA, Shinichi YASUEDA