Patents by Inventor Masuhide Ishikawa

Masuhide Ishikawa 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).

  • Publication number: 20150160152
    Abstract: An electrode for superoxide anions characterized by comprising a conductive component and, superimposed on a surface thereof, a film resulting from electrolytic polymerization of a metal thiofurylporphyrin/axial ligand complex; and a sensor for measuring a superoxide anion concentration including the same. The electrode for superoxide anions, by virtue of not only the excellent performance of electrode provided with the metal porphyrin complex polymer film, but also the presence of the axial ligand, can prevent poisoning by a catalyst poison such as hydrogen peroxide. Accordingly, in any of in vitro or in vivo environments, this electrode for superoxide anions enables detection of superoxide anion radicals without suffering any influence from a catalyst poison such as hydrogen peroxide. Moreover, quantitative assay of superoxide anions can be performed by the use of this electrode for superoxide anion in combination with a counter electrode or a reference electrode.
    Type: Application
    Filed: November 3, 2014
    Publication date: June 11, 2015
    Inventors: Makoto Yuasa, Kenichi Oyaizu, Aritomo Yamaguchi, Masuhide Ishikawa, Katsuya Eguchi, Tomohiro Kobayashi, Satoshi Tsutsui, Yuujirou Toyoda
  • Publication number: 20140061063
    Abstract: An electrode for active oxygen species comprising a conductive component with a polymer membrane of a metal porphyrin complex formed on the surface is disclosed. The electrode for active oxygen species can detect active oxygen species such as superoxide anion radicals, hydrogen peroxide, and .OH and other active radical species (NO, ONOO—, etc.) in any environment including in vivo environment as well as in vitro environment. The electrode thus can be used for specifying various diseases and examining active oxygen species in food or in water such as tap water and sewage water.
    Type: Application
    Filed: November 4, 2013
    Publication date: March 6, 2014
    Applicants: Makoto Yuasa, Hitoshi Takebayashi, Masahiko Abe
    Inventors: Makoto Yuasa, Masahiko Abe, Aritomo Yamaguchi, Asako Shiozawa, Masuhide Ishikawa, Katsuya Eguchi, Shigeru Kido
  • Publication number: 20120145562
    Abstract: An electrode for superoxide anions which contains a conductive component and, superimposed on a surface thereof, a film resulting from electrolytic polymerization of a metal thiofurylporphyrin/axial ligand complex; and a sensor for measuring a superoxide anion concentration including the same. The electrode for superoxide anions can prevent poisoning by a catalyst poison such as hydrogen peroxide. Accordingly, in any of in vitro or in vivo environments, this electrode for superoxide anions enables detection of superoxide anion radicals without suffering any influence from a catalyst poison such as hydrogen peroxide. Moreover, quantitative assay of superoxide anions can be performed with this electrode for superoxide anion in combination with a counter electrode or a reference electrode. Thus, this electrode for superoxide anions can find wide applicability in various fields.
    Type: Application
    Filed: October 11, 2011
    Publication date: June 14, 2012
    Applicant: Makoto Yuasa
    Inventors: Makoto Yuasa, Kenichi Oyaizu, Aritomo Yamaguchi, Masuhide Ishikawa, Katsuya Eguchi, Tomohiro Kobayashi, Satoshi Tsutsui, Yuujirou Toyoda
  • Publication number: 20110315551
    Abstract: An electrode for active oxygen species comprising a conductive component with a polymer membrane of a metal porphyrin complex formed on the surface is disclosed. The electrode for active oxygen species can detect active oxygen species such as superoxide anion radicals, hydrogen peroxide, and .OH and other active radical species (NO, ONOO—, etc.) in any environment including in vivo environment as well as in vitro environment. The electrode thus can be used for specifying various diseases and examining active oxygen species in food or in water such as tap water and sewage water.
    Type: Application
    Filed: September 6, 2011
    Publication date: December 29, 2011
    Applicants: Makoto YUASA, Hitoshi TAKEBAYASHI, Masahiko ABE
    Inventors: Makoto YUASA, Masahiko ABE, Aritomo Yamaguchi, Asako Shiozawa, Masuhide Ishikawa, Katsuya Eguchi, Shigeru Kido
  • Publication number: 20080289960
    Abstract: An electrode for superoxide anions characterized by comprising a conductive component and, superimposed on a surface thereof, a film resulting from electrolytic polymerization of a metal thiofurylporphyrin/axial ligand complex; and a sensor for measuring a superoxide anion concentration including the same. The electrode for superoxide anions, by virtue of not only the excellent performance of electrode provided with the metal porphyrin complex polymer film, but also the presence of the axial ligand, can prevent poisoning by a catalyst poison such as hydrogen peroxide. Accordingly, in any of in vitro or in vivo environments, this electrode for superoxide anions enables detection of superoxide anion radicals without suffering any influence from a catalyst poison such as hydrogen peroxide. Moreover, quantitative assay of superoxide anions can be performed by the use of this electrode for superoxide anion in combination with a counter electrode or a reference electrode.
    Type: Application
    Filed: March 12, 2004
    Publication date: November 27, 2008
    Applicant: Makoto Yuasa
    Inventors: Makoto Yuasa, Kenichi Oyaizu, Aritomo Yamaguchi, Masuhide Ishikawa, Katsuya Eguchi, Tomohiro Kobayashi, Satoshi Tsutsui, Yuujirou Toyoda
  • Publication number: 20050077192
    Abstract: An electrode for active oxygen species comprising a conductive component with a polymer membrane of a metal porphyrin complex formed on the surface is disclosed. The electrode for active oxygen species can detect active oxygen species such as superoxide anion radicals, hydrogen peroxide, and .OH and other active radical species (NO, ONOO—, etc.) in any environment including in vivo environment as well as in vitro environment. The electrode thus can be used for specifying various diseases and examining active oxygen species in food or in water such as tap water and sewage water.
    Type: Application
    Filed: December 19, 2002
    Publication date: April 14, 2005
    Applicant: makoto yuasa
    Inventors: Makoto Yuasa, Masahiko Abe, Aritomo Yamaguchi, Asako Shiozawa, Masuhide Ishikawa, Katsuya Eguchi, Shigeru Kido