Patents by Inventor Daiki ASAKAWA

Daiki ASAKAWA 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: 20220260527
    Abstract: An ion analyzer for analyzing product ions generated by irradiating precursor ions derived from a sample component with radicals, the ion analyzer including a reaction chamber 2, a radical supply unit 5, 6 configured to generate radicals and supply the radicals to the reaction chamber, a radical temperature acquisition unit 911, 912 configured to acquire a temperature of the radicals to be supplied to the reaction chamber, a standard substance supply unit 11 configured to supply a predetermined amount of predetermined precursor ions to the reaction chamber, the predetermined precursor ions being generated from a standard substance whose activation energy of a reaction in which the radicals attach to the standard substance is known, an ion measurement unit 92 configured to measure an amount of predetermined product ions generated from the precursor ions derived from the standard substance by the reaction with the radicals, a reactive radical amount calculation unit 93 configured to obtain an amount of reactive
    Type: Application
    Filed: July 19, 2019
    Publication date: August 18, 2022
    Applicants: Shimadzu Corporation, National Institute of Advanced Industrial Science and Technology
    Inventors: Hidenori TAKAHASHI, Daiki ASAKAWA
  • Publication number: 20220254621
    Abstract: In a method for analyzing isoaspartic acid by dissociating precursor ions derived from a sample component and generating and analyzing product ions, the method includes: generating product ions by irradiating the precursor ions with hydrogen radicals or radicals having oxidizing ability to dissociate the precursor ions; separating and detecting the product ions according to a mass-to-charge ratio; and specifying product ions derived from isoaspartic acid based on a mass-to-charge ratio of the product ions.
    Type: Application
    Filed: July 14, 2020
    Publication date: August 11, 2022
    Applicants: SHIMADZU CORPORATION, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hidenori TAKAHASHI, Daiki ASAKAWA
  • Publication number: 20220157586
    Abstract: An ion analyzer includes a reaction chamber into which precursor ions derived from a sample component are introduced, a radical irradiation unit that generates and emits a predetermined type of radicals, a standard substance supply unit that individually supplies kinds of standard substances to the reaction chamber, where activation energy of radical addition reaction is known for each of the kinds of standard substances, and the activation energies are different in magnitude, an ion measurement unit that measures an amount of predetermined product ions generated from precursor ions derived from the standard substance by irradiation with the radicals, and a radical temperature calculation unit that obtains an amount of radicals that caused the radical addition reaction from the amount of the predetermined product ions and obtains a radical temperature based on a relationship between the amount of the radicals obtained for each kind of standard substance and activation energy.
    Type: Application
    Filed: April 2, 2019
    Publication date: May 19, 2022
    Applicants: SHIMADZU CORPORATION, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hidenori TAKAHASHI, Daiki ASAKAWA