Patents by Inventor Shoujiro Ogawa

Shoujiro Ogawa 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).

  • Compound, derivatization reagent, and method for synthesizing compound
    Patent number: 11718590
    Abstract: A compound represented by Chemical formula 1: wherein n is an integer of 2 or more, is provided. Also provided is a derivatization reagent for derivatizing a diene-containing compound, including a compound represented by Chemical formula 1. Further provided is a synthesis method for a compound, including a nucleophilic substitution reaction between an aryl halide and a heterocyclic amine compound being saturated, the compound being represented by Chemical formula 1.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: August 8, 2023
    Assignees: TOKYO UNIVERSITY OF SCIENCE FOUNDATION, JEOL Ltd.
    Inventors: Tatsuya Higashi, Shoujiro Ogawa, Masaki Takiwaki, Seketsu Fukuzawa
  • Compound, Derivatization Reagent, and Method for Synthesizing Compound
    Publication number: 20220204459
    Abstract: A compound represented by Chemical formula 1: wherein n is an integer of 2 or more, is provided. Also provided is a derivatization reagent for derivatizing a diene-containing compound, including a compound represented by Chemical formula 1. Further provided is a synthesis method for a compound, including a nucleophilic substitution reaction between an aryl halide and a heterocyclic amine compound being saturated, the compound being represented by Chemical formula 1.
    Type: Application
    Filed: December 21, 2021
    Publication date: June 30, 2022
    Inventors: Tatsuya Higashi, Shoujiro Ogawa, Masaki Takiwaki, Seketsu Fukuzawa
  • Reagent kit and method for derivatizing and quantifying vitamin D using a mass spectrometer
    Patent number: 11193948
    Abstract: Provided is a method for quantifying vitamin D, with the vitamin D contained in a biological sample being derivatized with a derivatization reagent and being measured with a mass spectrometer, the method including, a derivatization step of derivatizing n number of samples by using n types of 4-(4?-dimethylaminophenyl)-1,2,4-triazoline-3,5-dione (DAPTAD) isotopologues respectively as derivatization reagents, a mixing step of mixing the n types of derivatization samples obtained in the derivatization step, and a quantitative analysis step of subjecting each of the n types of vitamin D derivatives contained in the mixed sample obtained in the mixing step to quantitative analysis using a mass spectrometer.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: December 7, 2021
    Assignees: Tokyo University of Science, National University Corporation Chiba University, JEOL Ltd.
    Inventors: Tatsuya Higashi, Shoujiro Ogawa, Fumio Nomura, Mamoru Satoh, Masaki Takiwaki
  • Method for derivatizing an s-cis-diene compound, derivatization reagent kit, and method for analyzing an s-cis-diene compound
    Patent number: 10761102
    Abstract: Provided is a method for derivatizing an s-cis-diene compound with a Cookson-type derivatization reagent, the method including adding, in a reaction stopping step of stopping a derivatization reaction of the s-cis-diene compound, a decomposition inhibitor to inhibit decomposition of a derivative to be obtained.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: September 1, 2020
    Assignees: Tokyo University of Science, National University Corporation Chiba University, JEOL Ltd.
    Inventors: Tatsuya Higashi, Shoujiro Ogawa, Fumio Nomura, Mamoru Satoh, Masaki Takiwaki
  • Method for Quantifying Vitamin D, Mass Spectrometer and Reagent Kit for Quantifying Vitamin D
    Publication number: 20180136240
    Abstract: Provided is a method for quantifying vitamin D, with the vitamin D contained in a biological sample being derivatized with a derivatization reagent and being measured with a mass spectrometer, the method including, a derivatization step of derivatizing n number of samples by using n types of 4-(4?-dimethylaminophenyl)-1,2,4-triazoline-3,5-dione (DAPTAD) isotopologues respectively as derivatization reagents, a mixing step of mixing the n types of derivatization samples obtained in the derivatization step, and a quantitative analysis step of subjecting each of the n types of vitamin D derivatives contained in the mixed sample obtained in the mixing step to quantitative analysis using a mass spectrometer.
    Type: Application
    Filed: November 15, 2017
    Publication date: May 17, 2018
    Inventors: Tatsuya Higashi, Shoujiro Ogawa, Fumio Nomura, Mamoru Satoh, Masaki Takiwaki
  • Method for Derivatizing An S-Cis-Diene Compound, Derivatization Reagent Kit, and Method for Analyzing an S-Cis-Diene Compound
    Publication number: 20180088137
    Abstract: Provided is a method for derivatizing an s-cis-diene compound with a Cookson-type derivatization reagent, the method including adding, in a reaction stopping step of stopping a derivatization reaction of the s-cis-diene compound, a decomposition inhibitor to inhibit decomposition of a derivative to be obtained.
    Type: Application
    Filed: September 28, 2017
    Publication date: March 29, 2018
    Inventors: Tatsuya Higashi, Shoujiro Ogawa, Fumio Nomura, Mamoru Satoh, Masaki Takiwaki