Patents by Inventor Aki Hirayama

Aki Hirayama 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).

  • Organic-inorganic hybrid composite of polymerized nitroxide compound and inorganic particles
    Patent number: 9333265
    Abstract: Provided is an organic-inorganic hybrid composite of a polymerized cyclic nitroxide radical compound and inorganic nanoparticles. Such a composite is capable, for example, of maintaining a stable nanoparticle shape in gastric fluid, and can be used by itself or as a carrier for delivery of another drug to the intestines.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: May 10, 2016
    Assignees: UNIVERSITY OF TSUKUBA, TSUKUBA UNIVERSITY OF TECHNOLOGY
    Inventors: Yukio Nagasaki, Yutaka Ikeda, Toru Yoshitomi, Tatsuya Yaguchi, Mayo Yamashita, Md. Amran Hossain, Tomoki Yoshinari, Atsushi Ueda, Aki Hirayama
  • ORGANIC-INORGANIC HYBRID COMPOSITE OF POLYMERIZED NITROXIDE COMPOUND AND INORGANIC PARTICLES
    Publication number: 20150118310
    Abstract: Provided is an organic-inorganic hybrid composite of a polymerized cyclic nitroxide radical compound and inorganic nanoparticles. Such a composite is capable, for example, of maintaining a stable nanoparticle shape in gastric fluid, and can be used by itself or as a carrier for delivery of another drug to the intestines.
    Type: Application
    Filed: February 6, 2013
    Publication date: April 30, 2015
    Inventors: Yukio Nagasaki, Yutaka Ikeda, Toru Yoshitomi, Tatsuya Yaguchi, Mayo Yamashita, Md. Amran Hossain, Tomoki Yoshinari, Atsushi Ueda, Aki Hirayama
  • Polymerized cyclic nitroxide radical compound and use thereof
    Patent number: 8980241
    Abstract: A method of covalently bonding a cyclic nitroxide radical compound to a hydrophobic block of a specific hydrophylic-phobic block copolymer, and polymerized cyclic nitroxide radical compound copolymerized in this manner, as well as use of such a compound, for instance, in the medical field are provided. The compound demonstrates long term stability in vivo under reductive environment.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: March 17, 2015
    Assignee: University of Tsukuba
    Inventors: Yukio Nagasaki, Toru Yoshitomi, Hirofumi Matsui, Aki Hirayama, Takashi Mamiya, Akira Matsumura, Kensuke Suzuki, Hideo Tsurushima, Aiki Marushima, Kazuko Toh, Daisuke Miyamoto
  • POLYMERIZED CYCLIC NITROXIDE RADICAL COMPOUND AND USE THEREOF
    Publication number: 20110142787
    Abstract: A method of covalently bonding a cyclic nitroxide radical compound to a hydrophobic block of a specific hydrophylic-phobic block copolymer, and polymerized cyclic nitroxide radical compound copolymerized in this manner, as well as use of such a compound, for instance, in the medical field are provided. The compound demonstrates long term stability in vivo under reductive environment.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 16, 2011
    Inventors: Yukio Nagasaki, Toru Yoshitomi, Hirofumi Matsui, Aki Hirayama, Takashi Mamiya, Akira Matsumura, Kensuke Suzuki, Hideo Tsurushima, Aiki Marushima, Kazuko Toh, Daisuke Miyamoto
  • Outlet box
    Patent number: D873778
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: January 28, 2020
    Inventors: Akiteru Hirayama, Aki Hirayama, Rinta Hirayama, Ai Hirayama