Patents by Inventor Yudai KAWASHIMA

Yudai KAWASHIMA 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: 11859239
    Abstract: Provided is a nucleic acid sample-contained container including; a first nucleic acid molecule including an intended base sequence and a base sequence for detection different from the intended base sequence; and a second nucleic acid molecule free of the intended base sequence but including the base sequence for detection, wherein the nucleic acid sample-contained container includes the first nucleic acid molecule in a predetermined number. In a preferable mode, the copy number of the intended base sequence is less than 1,000, and the coefficient of variation (CV value) for the copy number is lower than 20%. In a more preferable mode, the nucleic acid molecules are artificially synthesized nucleic acid molecules. In a yet more preferable mode, the first nucleic acid molecule includes the intended base sequence in a plural number in the same molecule.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: January 2, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Yudai Kawashima, Masayuki Yumoto, Satoshi Izumi, Manabu Seo
  • Publication number: 20230323295
    Abstract: There is provided a production method for microglia, including a step of introducing, into pluripotent stem cells, a nucleic acid including an open reading frame of a transcription factor that increases expression of a Complement C3 (C3) gene. In the production method, the transcription factor is selected from the group consisting of SPI1, CEBPA, PTAFR, FLI1, MEF2C, EGR2, RUNX1, TNF, CEBPB, IKZF1, KLF6, NFIC, ELF4, PAX8, PRDM1, MEF2A, and NR4A3.
    Type: Application
    Filed: March 1, 2023
    Publication date: October 12, 2023
    Applicants: Ricoh Company, Ltd., Elixirgen Scientific, Inc.
    Inventors: Masayuki YUMOTO, Yudai KAWASHIMA, Hikaru WATANABE, Toshihiko HOSOYA, Minoru KO
  • Patent number: 11705218
    Abstract: In one embodiment, provided are a method for analyzing at least one nucleic acid that can conveniently and highly accurately analyze even a very small number of analyte at least one nucleic acid. In one embodiment, the present invention relates to a method for analyzing at least one nucleic acid, comprising: a library preparation step of preparing a library comprising at least one standard nucleic acid of specific copy number(s) and at least one analyte nucleic acid in a same system; a calibration curve data generation step of generating calibration curve data based on the copy number(s) of the at least one standard nucleic acid of specific copy number(s); and an analyte nucleic acid analysis step of identifying at least one nucleotide sequence of the analyte nucleic acid while identifying the number(s) of the at least one nucleotide sequence of the at least one analyte nucleic acid using the calibration curve data.
    Type: Grant
    Filed: December 18, 2019
    Date of Patent: July 18, 2023
    Assignees: Ricoh Company, Ltd., FASMAC CO., LTD.
    Inventors: Yusuke Osaki, Hirotaka Unno, Yudai Kawashima, Michie Hashimoto, Masayuki Yumoto, Satoshi Nakazawa, Yuki Yonekawa, Takahiro Matsudaira, Eri Nishiyama
  • Publication number: 20210309958
    Abstract: Provided is a device including at least one well and an amplifiable reagent contained in a specific copy number in the at least one well. In a preferable mode, the device includes information on the specific copy number of the amplifiable reagent. In a more preferable mode, the device includes information on uncertainty as the information on the specific copy number, and the information on uncertainty includes a coefficient of variation CV of the amplifiable reagent, and the coefficient of variation CV satisfies a relational expression: CV<1/Vx, where x represents an average specific copy number of the amplifiable reagent. In a particularly preferable mode, the device includes a plurality of wells in which the amplifiable reagent is contained, and the amplifiable reagent is contained in each of the wells in the same specific copy number. The invention may use microscopes to verify the number of cells comprising the amplifiable reagent, i.e. nucleic acid, in each of the wells.
    Type: Application
    Filed: November 13, 2018
    Publication date: October 7, 2021
    Inventors: Satoshi IZUMI, Manabu SEO, Yudai KAWASHIMA, Yusuke OSAKI
  • Patent number: 11040349
    Abstract: Provided is a device including: at least one well in which an amplifiable reagent is contained in a specific copy number of less than 100; and at least one well in which the amplifiable reagent is contained in a specific copy number of 100 or greater, wherein for the at least one well in which the specific copy number of the amplifiable reagent is less than 100, a formula: CV<1/?x is established, where CV represents a coefficient of variation for the specific copy number and x represents average specific copy number of the amplifiable reagent.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: June 22, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Yudai Kawashima, Satoshi Izumi, Manabu Seo
  • Publication number: 20210147906
    Abstract: Provided is a detection determining method used in detection of a testing target in a sample by amplification of the testing target and an amplifiable reagent, wherein the amplifiable reagent is provided in a number of 200 or less, the detection determining method including a determining step of determining that the testing target is present and a detection result is positive when the amplifiable reagent is amplified and the testing target is amplified, and determining that the testing target is absent or at least less than a specific copy number of the amplifiable reagent and a detection result is negative when the amplifiable reagent is amplified and the testing target is not amplified. Also provided are a detection determining device, a detection determining program, and a device used for the detection determining method.
    Type: Application
    Filed: November 22, 2018
    Publication date: May 20, 2021
    Inventors: Yusuke OSAKI, Satoshi IZUMI, Yudai KAWASHIMA, Michie HASHIMOTO, Manabu SEO, Koei SUZUKI, Hirotaka UNNO
  • Patent number: 10914987
    Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 9, 2021
    Assignees: KYOTO UNIVERSITY, KYUSHU UNIVERSITY, NAT'L UNIVERSITY CORPORATION, SHARP KABUSHIKI KAISHA, DIC CORPORATION
    Inventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
  • Publication number: 20210010072
    Abstract: Provided is a device including: a plurality of wells; a reagent composition located in each of the wells and containing an amplifiable reagent in a specific copy number; and two or more groups into which the wells are divided to have the amplifiable reagent located in the same specific copy number but to be varied in composition of the reagent composition except for the specific copy number. Preferably, composition except for the specific copy number of the amplifiable reagent includes at least any one of primer and amplifying reagent. More preferably, the device includes two or more groups varied in the specific copy number. Yet more preferably, the groups of wells include at least a negative control group in which the specific copy number of the amplifiable reagent is 0, and a group in which the specific copy number of the amplifiable reagent is close to the limit of detection.
    Type: Application
    Filed: November 22, 2018
    Publication date: January 14, 2021
    Inventors: Koei SUZUKI, Hirotaka UNNO, Manabu SEO, Satoshi IZUMI, Yusuke OSAKI, Yudai KAWASHIMA, Michie HASHIMOTO
  • Publication number: 20200384464
    Abstract: Provided is a detection determining device used in a detection determining method including, in detection of a testing target in a sample by amplification of the testing target and an amplifiable reagent, determining that the testing target is present and a detection result is positive when the amplifiable reagent is amplified and the testing target is amplified, and determining that the testing target is absent or at least less than a specific copy number of the amplifiable reagent and a detection result is negative when the amplifiable reagent is amplified and the testing target is not amplified, the detection determining device including at least one well, wherein the amplifiable reagent in the at least one well is contained in a specific copy number.
    Type: Application
    Filed: May 12, 2020
    Publication date: December 10, 2020
    Inventors: Yudai KAWASHIMA, Michie HASHIMOTO, Koei SUZUKI, Yusuke OSAKI, Hirotaka UNNO, Manabu SEO, Satoshi IZUMI
  • Publication number: 20200241336
    Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.
    Type: Application
    Filed: August 26, 2016
    Publication date: July 30, 2020
    Applicants: Kyoto University, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sharp Kabushiki Kaisha, DIC Corporation
    Inventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
  • Publication number: 20200194100
    Abstract: In one embodiment, provided are a method for analyzing at least one nucleic acid that can conveniently and highly accurately analyze even a very small number of analyte at least one nucleic acid. In one embodiment, the present invention relates to a method for analyzing at least one nucleic acid, comprising: a library preparation step of preparing a library comprising at least one standard nucleic acid of specific copy number(s) and at least one analyte nucleic acid in a same system; a calibration curve data generation step of generating calibration curve data based on the copy number(s) of the at least one standard nucleic acid of specific copy number(s); and an analyte nucleic acid analysis step of identifying at least one nucleotide sequence of the analyte nucleic acid while identifying the number(s) of the at least one nucleotide sequence of the at least one analyte nucleic acid using the calibration curve data.
    Type: Application
    Filed: December 18, 2019
    Publication date: June 18, 2020
    Inventors: Yusuke OSAKI, Hirotaka UNNO, Yudai KAWASHIMA, Michie HASHIMOTO, Masayuki YUMOTO, Satoshi NAKAZAWA, Yuki YONEKAWA, Takahiro MATSUDAIRA, Eri NISHIYAMA
  • Publication number: 20190284611
    Abstract: Provided is a nucleic acid sample-contained container including; a first nucleic acid molecule including an intended base sequence and a base sequence for detection different from the intended base sequence; and a second nucleic acid molecule free of the intended base sequence but including the base sequence for detection, wherein the nucleic acid sample-contained container includes the first nucleic acid molecule in a predetermined number. In a preferable mode, the copy number of the intended base sequence is less than 1,000, and the coefficient of variation (CV value) for the copy number is lower than 20%. In a more preferable mode, the nucleic acid molecules are artificially synthesized nucleic acid molecules. In a yet more preferable mode, the first nucleic acid molecule includes the intended base sequence in a plural number in the same molecule.
    Type: Application
    Filed: March 18, 2019
    Publication date: September 19, 2019
    Inventors: YUDAI KAWASHIMA, MASAYUKI YUMOTO, SATOSHI IZUMI, MANABU SEO
  • Publication number: 20190151843
    Abstract: Provided is a device including: at least one well in which an amplifiable reagent is contained in a specific copy number of less than 100; and at least one well in which the amplifiable reagent is contained in a specific copy number of 100 or greater, wherein for the at least one well in which the specific copy number of the amplifiable reagent is less than 100, a formula: CV<1/?x is established, where CV represents a coefficient of variation for the specific copy number and x represents average specific copy number of the amplifiable reagent.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 23, 2019
    Inventors: Yudai Kawashima, Satoshi Izumi, Manabu Seo
  • Publication number: 20190136304
    Abstract: Provided is a detection accuracy identifying method for identifying a detection accuracy for detecting a testing target nucleic acid, the method including identifying a detection accuracy ability of the testing target nucleic acid, using a standard substance containing a known number of nucleic acid molecule and based on a probability at which the known number of nucleic acid molecule is detected.
    Type: Application
    Filed: October 16, 2018
    Publication date: May 9, 2019
    Inventors: Manabu SEO, Satoshi IZUMI, Yudai KAWASHIMA