Patents by Inventor Hiroyasu MIWA

Hiroyasu MIWA 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).

  • Arbekacin derivative, and production and use thereof
    Patent number: 9751907
    Abstract: It has been found that adding carbon dioxide or the like to a solution containing arbekacin free base makes it possible to produce arbekacin derivatives including arbekacin carbonate and carbamic acid of arbekacin. Moreover, it has been found that the arbekacin derivatives have a high stability, and that the use thereof enables efficient productions of highly-pure arbekacin free base and pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: September 5, 2017
    Assignee: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Hiroyasu Miwa, Hisashi Kishi, Toshiro Sasaki, Takashi Murata, Makoto Oyama, Nao Sano, Ayako Odagiri
  • ARBEKACIN DERIVATIVE, AND PRODUCTION AND USE THEREOF
    Publication number: 20160096859
    Abstract: It has been found that adding carbon dioxide or the like to a solution containing arbekacin free base makes it possible to produce arbekacin derivatives including arbekacin carbonate and carbamic acid of arbekacin. Moreover, it has been found that the arbekacin derivatives have a high stability, and that the use thereof enables efficient productions of highly-pure arbekacin free base and pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: May 29, 2014
    Publication date: April 7, 2016
    Applicant: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Hiroyasu MIWA, Hisashi KISHI, Toshiro SASAKI, Takashi MURATA, Makoto OYAMA, Nao SANO, Ayako ODAGIRI