Patents by Inventor Koichi OGI

Koichi OGI 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).

  • PH-RESPONSIVE LIPID DERIVATIVE
    Publication number: 20240374733
    Abstract: The present invention provides a pH-responsive lipid derivative represented by a structure represented by the following formula (i): (in the above-mentioned formula, each symbol is as described in the specification), and a pH-responsive transport carrier which is useful as a transport carrier for safely and efficiently performing delivery of low-molecular-weight drugs and the like to tumor tissues.
    Type: Application
    Filed: July 6, 2022
    Publication date: November 14, 2024
    Applicants: NOF Corporation, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Koichi OGI, Junya MICHINISHI, Tomoyuki OHTAKE, Nobuhiro NISHIYAMA, Hiroyasu TAKEMOTO, Yutaka MIURA, Takahiro NOMOTO, Makoto MATSUI, Yi-Jung SUNG, Masahiro TOYODA, Aria GHASEMIZADEH
  • HIGHLY-PURE PH-RESPONSIVE POLYMER AND METHOD FOR PRODUCING SAME
    Publication number: 20240301137
    Abstract: The present invention provides a highly pure pH-responsive polymer represented by the following formula (I), a production method thereof, and the like: (in the formula (I), each symbol is as described in the specification).
    Type: Application
    Filed: July 6, 2022
    Publication date: September 12, 2024
    Applicants: NOF CORPORATION, TOKYO INSTITUTE OF TECHNOLOGY
    Inventors: Koichi OGI, Junya MICHINISHI, Tomoyuki OHTAKE, Muneaki IIZUKA, Nobuhiro NISHIYAMA, Hiroyasu TAKEMOTO, Yutaka MIURA, Takahiro NOMOTO, Makoto MATSUI, Yi-Jung SUNG, Masahiro TOYODA, Aria GHASEMIZADEH
  • Method for purifying trityl group-containing monodispersed polyethylene glycol
    Patent number: 11680137
    Abstract: A method for purifying a specific trityl group-containing monodispersed polyethylene glycol from a mixture containing the trityl group-containing monodispersed polyethylene glycol and a specific ditritylated impurity. The method includes performing steps (A), (B) and (C). Step (A): a step of esterifying the hydroxyl group of the trityl group-containing monodispersed polyethylene glycol by a specific method; Step (B): a step of extracting the esterified compound by a specific method; and Step (C): a step of hydrolyzing the esterified compound to obtain the trityl group-containing monodispersed polyethylene glycol.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: June 20, 2023
    Assignee: NOF CORPORATION
    Inventors: Koichi Ogi, Takuma Tsubusaki, Kohei Yoshimura
  • METHOD FOR PURIFYING TRITYL GROUP-CONTAINING MONODISPERSED POLYETHYLENE GLYCOL
    Publication number: 20210009756
    Abstract: A method for purifying a specific trityl group-containing monodispersed polyethylene glycol from a mixture containing the trityl group-containing monodispersed polyethylene glycol and a specific ditritylated impurity. The method includes performing steps (A), (B) and (C). Step (A): a step of esterifying the hydroxyl group of the trityl group-containing monodispersed polyethylene glycol by a specific method; Step (B): a step of extracting the esterified compound by a specific method; and Step (C): a step of hydrolyzing the esterified compound to obtain the trityl group-containing monodispersed polyethylene glycol.
    Type: Application
    Filed: March 26, 2019
    Publication date: January 14, 2021
    Applicant: NOF CORPORATION
    Inventors: Koichi OGI, Takuma TSUBUSAKI, Kohei YOSHIMURA