Patents by Inventor Keiji Itaka

Keiji Itaka 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).

  • Polyethylene glycol/polycation block copolymers
    Publication number: 20070059271
    Abstract: The invention provides block copolymers formed of poly(ethylene glycol) segments and poly(amino acid derivative) segments having side chains of at least one kind of specific amine residue. The invention also provides polyion complexes of such copolymers with polynucleotides and the like. These block copolymers are useful as carriers for in vivo delivery of active substances such as DNA.
    Type: Application
    Filed: May 7, 2004
    Publication date: March 15, 2007
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Kazunori Kataoka, Naoki Kanayama, Keiji Itaka, Shigeto Fukushima, Atsushi Harada