Patents by Inventor Keitaro Umezawa

Keitaro Umezawa 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: 10837909
    Abstract: [Problem] To provide a novel fluorescent probe for super-resolution imaging that uses fluorescent light emission characteristics that originate from an intermolecular nucleophilic addition-dissociation equilibrium reaction, and to provide a super-resolution fluorescent imaging method that uses the probe.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: November 17, 2020
    Assignee: The University of Tokyo
    Inventors: Yasuteru Urano, Mako Kamiya, Akihiko Morozumi, Shinnosuke Uno, Keitaro Umezawa
  • Patent number: 10261090
    Abstract: [Problem] To provide the following: a novel fluorescent probe for detecting a compound, such as glutathione, that contains a —SH group; a detection method using said fluorescent probe; and a detection kit containing said probe.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: April 16, 2019
    Assignee: THE UNIVERSITY OF TOKYO
    Inventors: Yasuteru Urano, Mako Kamiya, Keitaro Umezawa, Masafumi Yoshida
  • Publication number: 20180052109
    Abstract: [Problem] To provide a novel fluorescent probe for super-resolution imaging that uses fluorescent light emission characteristics that originate from an intermolecular nucleophilic addition-dissociation equilibrium reaction, and to provide a super-resolution fluorescent imaging method that uses the probe.
    Type: Application
    Filed: February 23, 2016
    Publication date: February 22, 2018
    Inventors: Yasuteru URANO, Mako KAMIYA, Akihiko MOROZUMI, Shinnosuke UNO, Keitaro UMEZAWA
  • Patent number: 9701841
    Abstract: The invention pertains to a near-infrared fluorescent dye that is cell permeable and can be attached to selected proteins in living cells. The dye has the general formula or its corresponding spirolactone wherein Y is chosen from the group consisting of Si, Ge and Sn; R0 is —COO? or COOH; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15 and R16 are substituents, including hydrogen, independently from each other. The dye (i) absorbs and emits light at wavelengths above 600 nm; (ii) possesses high photostability; (iii) has high extinction coefficients and high quantum yields; (iv) can be derivatized with different molecules; and (v) is membrane-permeable and shows minimal background binding to biomolecules and biomolecular structures.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: July 11, 2017
    Assignee: Ecole Polytechnique Federale De Lausanne (EPFL)
    Inventors: Keitaro Umezawa, Lukinavicius Grazvydas, Kai Johnsson
  • Publication number: 20170045525
    Abstract: [Problem] To provide the following: a novel fluorescent probe for detecting a compound, such as glutathione, that contains a —SH group; a detection method using said fluorescent probe; and a detection kit containing said probe.
    Type: Application
    Filed: February 24, 2015
    Publication date: February 16, 2017
    Applicant: THE UNIVERSITY OF TOKYO
    Inventors: Yasuteru URANO, Mako KAMIYA, Keitaro UMEZAWA, Masafumi YOSHIDA
  • Publication number: 20160230011
    Abstract: The invention pertains to a near-infrared fluorescent dye that is cell permeable and can be attached to selected proteins in living cells. The dye has the general formula or its corresponding spiro ac one wherein Y is chosen from the group consisting of Si, Ge and Sn; R0 is —COO? or COOH; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R15 and R16 are substituents, including hydrogen, independently from each other. The dye (i) absorbs and emits light at wavelengths above 600 nm; (ii) possesses high photostability; (iii) has high extinction coefficients and high quantum yields; (iv) can be derivatized with different molecules; and (v) is membrane-permeable and shows minimal background binding to biomolecules and biomolecular structures.
    Type: Application
    Filed: April 19, 2016
    Publication date: August 11, 2016
    Inventors: Keitaro UMEZAWA, Lukinavicius GRAZVYDAS, Kai JOHNSSON
  • Patent number: 9346957
    Abstract: The invention pertains to a near-infrared fluorescent dye that is cell permeable and can be attached to selected proteins in living cells. The dye has the general formula or its corresponding spirolactone wherein Y is chosen from the group consisting of Si, Ge and Sn; R0 is —COO? or COOH; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15 and R16 are substituents, including hydrogen, independently from each other. The dye (i) absorbs and emits light at wavelengths above 600 nm; (ii) possesses high photostability; (iii) has high extinction coefficients and high quantum yields; (iv) can be derivatized with different molecules; and (v) is membrane-permeable and shows minimal background binding to biomolecules and biomolecular structures.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: May 24, 2016
    Assignee: École Polytechnique Fédérale de Lausanne (EPFL)
    Inventors: Keitaro Umezawa, Lukinavicius Grazvydas, Kai Johnsson
  • Publication number: 20140349282
    Abstract: The invention pertains to a near-infrared fluorescent dye that is cell permeable and can be attached to selected proteins in living cells. The dye has the general formula or its corresponding spirolactone wherein Y is chosen from the group consisting of Si, Ge and Sn; R0 is —COO? or COOH; R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15 and R16 are substituents, including hydrogen, independently from each other. The dye (i) absorbs and emits light at wavelengths above 600 nm; (ii) possesses high photostability; (iii) has high extinction coefficients and high quantum yields; (iv) can be derivatized with different molecules; and (v) is membrane-permeable and shows minimal background binding to biomolecules and biomolecular structures.
    Type: Application
    Filed: August 26, 2011
    Publication date: November 27, 2014
    Inventors: Keitaro Umezawa, Lukinavicius Grazvydas, Kai Johnsson
  • Patent number: 8193350
    Abstract: A novel fluorescent compound having a high light fastness, high fluorescence quantum yield and sharp absorption spectrum, which emits fluorescence having a wavelength in long wavelength region, as well as its use as a labeling agent, is disclosed. In Formula [I] below, by forming a specific hetero ring(s) with R1 and R2, and/or R6 and R7, shift of the wavelength of the fluorescence to longer wavelength and increase in molar extinction coefficient are attained maintaining the high light fastness, high fluorescence quantum yield and sharp absorption spectrum which the fluorescent dyes having the boron dipyrromethene skeleton have.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: June 5, 2012
    Assignee: Keio University
    Inventors: Koji Suzuki, Keitaro Umezawa, Hiroshi Makino, Daniel Citterio
  • Publication number: 20090176313
    Abstract: A novel fluorescent compound having a high light fastness, high fluorescence quantum yield and sharp absorption spectrum, which emits fluorescence having a wavelength in long wavelength region, as well as its use as a labeling agent, is disclosed. In Formula [I] below, by forming a specific hetero ring(s) with R1 and R2, and/or R6 and R7, shift of the wavelength of the fluorescence to longer wavelength and increase in molar extinction coefficient are attained maintaining the high light fastness, high fluorescence quantum yield and sharp absorption spectrum which the fluorescent dyes having the boron dipyrromethene skeleton have.
    Type: Application
    Filed: April 27, 2007
    Publication date: July 9, 2009
    Applicant: Keio University
    Inventors: Koji Suzuki, Keitaro Umezawa, Hiroshi Makino, Daniel Citterio