Patents by Inventor Masato Iwatsuki

Masato Iwatsuki 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).

  • Patent number: 10538521
    Abstract: The present invention provides a novel 2,4,6-substituted pyrimidine derivative, which is a compound represented by formula (I) (in the formula, ring A is a 6-membered heteroaryl group having at least one N atom optionally substituted with R1, R2, and R3; Z is an optionally substituted alkoxy group, an optionally substituted amino group, an optionally substituted heterocycloalkyl group, or an optionally substituted heteroaryl group; and R1, R2, and R3 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted alkoxy group, an optionally substituted cycloalkyloxy group, an optionally substituted heterocycloalkyloxy group, an optionally substituted phenoxy group, an optionally substituted amino group, a nitro group, and a hydroxy group) or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: January 21, 2020
    Assignees: CARNA BIOSCIENCES, INC., THE KITASATO INSTITUTE
    Inventors: Masaaki Sawa, Yuko Asamitsu, Yuko Uno, Satoshi Omura, Kazuhiko Otoguro, Masato Iwatsuki, Aki Ishiyama, Rei Hokari
  • Publication number: 20190345154
    Abstract: The present invention provides a novel 2,4,6-substituted pyrimidine derivative, which is a compound represented by formula (I) (in the formula, ring A is a 6-membered heteroaryl group having at least one N atom optionally substituted with R1, R2, and R3; Z is an optionally substituted alkoxy group, an optionally substituted amino group, an optionally substituted heterocycloalkyl group, or an optionally substituted heteroaryl group; and R1, R2, and R3 are each independently selected from the group consisting of a hydrogen atom, a halogen atom, an optionally substituted alkyl group, an optionally substituted cycloalkyl group, an optionally substituted alkoxy group, an optionally substituted cycloalkyloxy group, an optionally substituted heterocycloalkyloxy group, an optionally substituted phenoxy group, an optionally substituted amino group, a nitro group, and a hydroxy group) or a pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: October 25, 2017
    Publication date: November 14, 2019
    Applicants: CARNA BIOSCIENCES, INC., THE KITASATO INSTITUTE
    Inventors: Masaaki SAWA, Yuko ASAMITSU, Yuko UNO, Satoshi OMURA, Kazuhiko OTOGURO, Masato IWATSUKI, Aki ISHIYAMA, Rei HOKARI
  • Patent number: 9737558
    Abstract: The present invention provides a Peyer's patch activator containing a polysaccharide obtained from sugar cane as an active ingredient, wherein the polysaccharide contains ?-glucan as a main component and has a peak molecular weight within a range of 720,000 to 1,080,000, with a proportion of glucose in all component sugars being 80% or more, and proportions of nonreducing terminal glucose and ?-1,6-linked glucose being 20 to 30% and 15 to 25%, respectively.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: August 22, 2017
    Assignees: Mitsui Sugar Co., Ltd., The Kitasato Institute
    Inventors: Haruki Yamada, Hiroaki Kiyohara, Kazuhiko Otoguro, Aki Ishiyama, Masato Iwatsuki, Satoshi Omura, Masami Mizu, Toshikazu Kawai, Jun Kashimura, Kenji Koge
  • Publication number: 20150258131
    Abstract: The present invention provides a Peyer's patch activator containing a polysaccharide obtained from sugar cane as an active ingredient, wherein the polysaccharide contains ?-glucan as a main component and has a peak molecular weight within a range of 720,000 to 1,080,000, with a proportion of glucose in all component sugars being 80% or more, and proportions of nonreducing terminal glucose and ?-1,6-linked glucose being 20 to 30% and 15 to 25%, respectively.
    Type: Application
    Filed: September 18, 2013
    Publication date: September 17, 2015
    Applicants: The Kitakaso Institute, Mitsui Sugar Co., Ltd.
    Inventors: Haruki Yamada, Hiroaki Kiyohara, Kazuhiko Otoguro, Aki Ishiyama, Masato Iwatsuki, Satoshi Omura, Masami Mizu, Toshikazu Kawai, Jun Kashimura, Kenji Koge
  • Patent number: 9000194
    Abstract: The present invention addresses the problem of providing an anti-trypanosomal drug having a novel skeleton, in order to solve issues that occur with conventional technologies. The present invention is based on the discovery of a microbe that produces an anti-trypanosomal drug having a novel skeleton. Specifically, this invention provides: a compound indicated by formula (I) having a trypanosomal inhibitory activity; an analog thereof; a production method therefor; and a Lechevalieria sp. K10-0216 strain that produces said compound.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: April 7, 2015
    Assignee: The Kitasato Institute
    Inventors: Satoshi Omura, Yoko Takahashi, Takuji Nakashima, Kazuhiko Otoguro, Kazuro Shiomi, Masato Iwatsuki, Atsuko Matsumoto
  • Publication number: 20140206889
    Abstract: [Problem] The present invention addresses the problem of providing an anti-trypanosomal drug having a novel skeleton, in order to solve issues that occur with conventional technologies. [Solution] The present invention is based on the discovery of a microbe that produces an anti-trypanosomal drug having a novel skeleton. Specifically, this invention provides: a compound indicated by formula (I) having a trypanosomal inhibitory activity; an analog thereof; a production method therefor; and a Lechevalieria sp. Kl0-0216 strain that produces said compound.
    Type: Application
    Filed: August 31, 2012
    Publication date: July 24, 2014
    Applicant: THE KITASATO INSTITUTE
    Inventors: Satoshi Omura, Yoko Takahashi, Takuji Nakashima, Kazuhiko Otoguro, Kazuro Shiomi, Masato Iwatsuki, Atsuko Matsumoto
  • Patent number: 7439225
    Abstract: The present invention is comprised of culturing a microorganism having ability to produce K01-B0171-B substance and/or K01-B0171-C substance in a medium, accumulating K01-B0171-B substance and/or K01-B0171-C substance in a culture fluid and isolating K01-B0171-B substance and/or, K01-B0171-C substance from the culture fluid. The obtained K01-B0171-B substance, K01-B0171-C substance or a composition of these substances is expected to be useful as a medicament of antituberculous agent.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: October 21, 2008
    Assignee: The Kitasato Institute
    Inventors: Satoshi Omura, Hiroshi Tomoda, Masato Iwatsuki, Yoko Takahashi
  • Publication number: 20060089298
    Abstract: The present invention is comprised of culturing a microorganism having ability to produce K01-B0171-B substance and/or K01-B0171-C substance in a medium, accumulating K01-B0171-B substance and/or K01-B0171-C substance in a culture fluid and isolating K01-B0171-B substance and/or, K01-B0171-C substance from the culture fluid. The obtained K01-B0171-B substance, K01-B0171-C substance or a composition of these substances is expected to be useful as a medicament of antituberculous agent.
    Type: Application
    Filed: January 17, 2003
    Publication date: April 27, 2006
    Inventors: Satoshi Omura, Hiroshi Tomoda, Masato Iwatsuki, Yoko Takahashi