Patents by Inventor Yuuki YONEKAWA

Yuuki YONEKAWA 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: 20240093282
    Abstract: The present invention has an object to develop and provide a target nucleic acid detection device having a low copy number of IPC nucleic acids placed therein, and a method for producing the device, to avoid a decrease caused in the detection sensitivity to a target nucleic acid through competitive inhibition of the target nucleic acid by addition of an internal positive control (IPC) nucleic acid. Provided is a target nucleic acid detection device in which a low copy number of IPC nucleic acids that do not inhibit the amplification reaction of a target nucleic acid is preliminarily placed in a reaction well.
    Type: Application
    Filed: July 26, 2023
    Publication date: March 21, 2024
    Inventors: Yusuke OSAKI, Yuuki Yonekawa, Michie Hashimoto, Hirotaka Unno
  • Patent number: 11795446
    Abstract: A carrier includes a supporting part on which a specific number of cells A are supported. The cells A contain a specific number of copies of a nucleic acid, and the supporting part is made of a water-decomposable material.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: October 24, 2023
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Yonekawa, Hirotaka Unno, Satoshi Nakazawa
  • Publication number: 20230295702
    Abstract: A method of determining a limit of detection and a limit of quantitation in a nucleic acid detection test is provided, the method including, by using a container having a specific configuration, adding a negative specimen that does not contain target nucleic acids to a positive control group and adding a reagent used for a nucleic acid detection test to a negative control group and the positive control group to amplify the target nucleic acids, and determining a smallest specific copy number among specific copy numbers with a detection rate of 95% or greater in the positive control group as a limit of detection and determining a smallest specific copy number among specific copy numbers with CVln of 35% or less as a limit of quantitation in a case where the target nucleic acids are not detected in the negative control group.
    Type: Application
    Filed: December 28, 2022
    Publication date: September 21, 2023
    Applicants: Ricoh Company, Ltd., Kazusa DNA Research Institute
    Inventors: Yuuki YONEKAWA, Hirotaka UNNO, Satoshi NAKAZAWA, Yunong JI, Sakae ITOGA
  • Publication number: 20230168263
    Abstract: An information provision device includes an acquisition unit and an information output unit. The acquisition unit acquires test result data indicating a Cq value of a well obtained by a test device performing a polymerase chain reaction (PCR) test on a standard device having the well in which a known number of copies of a nucleic acid are disposed. The information output unit outputs comparison information obtained by comparing information obtained from evaluation target data that is the evaluation target data of an evaluation target with information obtained from one or more pieces of the test result data different from the evaluation target data.
    Type: Application
    Filed: January 26, 2023
    Publication date: June 1, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Hirotaka UNNO, Satoshi NAKAZAWA, Yuuki YONEKAWA, Yunong JI, Yusuke OSAKI
  • Publication number: 20230011171
    Abstract: A sample for evaluating performance of a genetic testing apparatus includes, a nucleic acid A; and a nucleic acid B, in which the nucleic acid A and the nucleic acid B have mutually different sequences. The nucleic acid A contains a specific number of molecules, and the nucleic acid B contains a number of molecules higher than the number of molecules of the nucleic acid A. A ratio A/B of the number of molecules of the nucleic acid A with respect to the number of molecules of the nucleic acid B is specified.
    Type: Application
    Filed: June 30, 2022
    Publication date: January 12, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Yusuke OSAKI, Satoshi Nakazawa, Yuuki Yonekawa, Hirotaka Unno, Michie Hashimoto, Masunori Kajikawa
  • Publication number: 20220170076
    Abstract: A method for manufacturing a device is provided, in which a known quantity of a reagent is reliably immobilized in a reaction field, which can be stored at room temperature, and with which the performance of a real-time PCR apparatus can be correctly evaluated. The method is a method for manufacturing a device having at least one well, in which a specific number of copies of a nucleic acid in the at least one well are immobilized in a reaction field. The method includes a nucleic acid extraction step of extracting the nucleic acid with an enzyme and a drying deactivation step of deactivating the enzyme by drying at 5° C. to 45° C.
    Type: Application
    Filed: November 22, 2021
    Publication date: June 2, 2022
    Applicants: Ricoh Company, Ltd., Fasmac Co., Ltd.
    Inventors: Hirotaka UNNO, Satoshi Nakazawa, Yuuki Yonekawa, Michie Hashimoto, Satoshi Futo, Mari Onishi, Riztyan
  • Publication number: 20210292739
    Abstract: A carrier includes a supporting part on which a specific number of cells A are supported. The cells A contain a specific number of copies of a nucleic acid, and the supporting part is made of a water-decomposable material.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 23, 2021
    Inventors: Yuuki YONEKAWA, Hirotaka UNNO, Satoshi NAKAZAWA