Patents by Inventor Takahito Kutsuna

Takahito Kutsuna 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).

  • Heterotelechelic block copolymers and process for producing the same
    Patent number: 5925720
    Abstract: This invention provides a heterotelechelic oligomer or polymer which is represented by formula below: ##STR1## wherein R.sup.1 and R.sup.2 form an acetal, or, combined with each other, denote oxy (.dbd.O),p, m, n and q each denote a certain integer,L is a group which forms an ester, andZ denotes a certain functional group.This invention a so provides a process to produce the above oligomer or polymer by means of living polymeri-zation. Since this oligomer or polymer forms a high- molecular micelle which is stable in an aqueous solvent, said oligomer or polymer will be useful as a carrier for drug delivery.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: July 20, 1999
    Assignee: Kazunori Kataoka
    Inventors: Kazunori Kataoka, Carmen Scholz, Michihiro Iijima, Takahito Kutsuna, Yukio Nagasaki, Masao Kato, Teruo Okano