Patents by Inventor Masafumi Iwamoto

Masafumi Iwamoto 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: 11958878
    Abstract: The present invention establishes a molecular therapy for glycogen storage disease type Ia. The present invention provides an oligonucleotide of 15-30 bases comprising a nucleotide sequence complementary to die cDNA of G6PC gene with c.648G>T mutation, wherein the oligonucleotide comprises a sequence complementary to a region comprising any site between the 82nd to the 92nd nucleotide from the 5? end of exon 5 of the G6PC gene with c.648C>T mutation, a pharmacologically acceptable salt or solvate thereof. Also provided is a pharmaceutical drug comprising the oligonucleotide, a pharmacologically acceptable salt or solvate thereof (e.g., therapeutic drug for glycogen storage disease type Ia).
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: April 16, 2024
    Assignees: Daiichi Sankyo Company, Limited, Kobe Gakuin Educational Foundation
    Inventors: Makoto Koizumi, Yoshiyuki Onishi, Takeshi Masuda, Mitsuhiro Iwamoto, Yukiko Sekiguchi, Kentaro Ito, Shinnosuke Tsuji, Masafumi Matsuo
  • Patent number: 11692006
    Abstract: This invention is intended to discover a novel solvent that can be used as an alternative to toluene in the step of deprotection in the method of solid-phase nucleic acid synthesis. With the use of such novel solvent, various problems caused by the use of toluene are dissolved. This invention is also intended to provide a method of solid-phase nucleic acid synthesis in which protected nucleoside phosphoramidites in which a protective group is bonded to a hydroxyl group at the 5?position or the 3? position of a nucleoside are sequentially bound on a solid phase carrier, where a reaction of removing the protecting group from the protected nucleoside phosphoramidite is carried out in a solution comprising an acid with a pKa of 0.2 to 0.8 and acetonitrile.
    Type: Grant
    Filed: July 4, 2018
    Date of Patent: July 4, 2023
    Assignee: Nitto Denko Corporation
    Inventors: Masafumi Iwamoto, Tsuyoshi Mukobata, Akira Yokouchi
  • Publication number: 20220276117
    Abstract: This seal state detection device includes a plurality of part case members including a cylinder facing part and a rod facing part and are aligned in a circumferential direction of a cylinder by causing the cylinder facing part to face the cylinder and the rod facing part to face a rod so that a housing chamber for housing a part of the cylinder and a part of the rod is formed between the cylinder facing part and the rod facing part. The cylinder facing part includes a seal part which contacts with the cylinder. The seal part includes a protruding part formed at one end and a recessed part formed at the other end in the circumferential direction of the cylinder. The protruding part and the recessed part are fitted to each other when the plurality of part case members are aligned in the circumferential direction of the cylinder.
    Type: Application
    Filed: August 25, 2020
    Publication date: September 1, 2022
    Inventors: Takanori ITO, Takayuki OHNO, Masafumi IWAMOTO
  • Publication number: 20210206797
    Abstract: This invention is intended to discover a novel solvent that can be used as an alternative to toluene in the step of deprotection in the method of solid-phase nucleic acid synthesis. With the use of such novel solvent, various problems caused by the use of toluene are dissolved. This invention is also intended to provide a method of solid-phase nucleic acid synthesis in which protected nucleoside phosphoramidites in which a protective group is bonded to a hydroxyl group at the 5?position or the 3? position of a nucleoside are sequentially bound on a solid phase carrier, where a reaction of removing the protecting group from the protected nucleoside phosphoramidite is carried out in a solution comprising an acid with a pKa of 0.2 to 0.8 and acetonitrile.
    Type: Application
    Filed: July 4, 2018
    Publication date: July 8, 2021
    Inventors: Masafumi Iwamoto, Tsuyoshi Mukobata, Akira Yokouchi
  • Patent number: 10287619
    Abstract: A method for measuring concentration of dehydrogenase and substrate thereof in the presence of living cells, wherein an electron mediator that is hard to be reduced by living cells, for example, a compound represented by Formula (I), an electron mediator represented by the Formula (I) and a measurement reagent for dehydrogenase and substrate thereof including the electron mediator are disclosed. A-L-M??(I), wherein A represents a structural part containing at least one anionic group, M represents a structural part for mediating electron transfer and L represents a linker part for linking the A to the M.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: May 14, 2019
    Assignee: Dojindo Laboratories
    Inventors: Masafumi Iwamoto, Tomoya Tanaka, Eiji Watanabe, Masanobu Shiga
  • Patent number: 10138266
    Abstract: The invention provides a cut-out method capable of suppressing production of a byproduct, wherein the object RNA oligonucleotide is not cleaved from a universal linker, which is produced in cutting out the object RNA oligonucleotide from the universal support, and capable of increasing the yield of the object RNA oligonucleotide. The RNA oligonucleotide cut-out method includes a step of bringing a universal support supporting an RNA oligonucleotide in contact with an aqueous solution containing alkylamine and a monovalent inorganic salt.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: November 27, 2018
    Assignee: Nitto Denko Corporation
    Inventors: Shohei Horie, Tatsuya Konishi, Kenjiro Mori, Eri Maeta, Tsuyoshi Mukobata, Masafumi Iwamoto
  • Publication number: 20170121753
    Abstract: A method for measuring concentration of dehydrogenase and substrate thereof in the presence of living cells, wherein an electron mediator that is hard to be reduced by living cells, for example, a compound represented by Formula (I) shown below, an electron mediator represented by the Formula (I) shown below and a measurement reagent for dehydrogenase and substrate thereof comprising the electron mediator are disclosed. A?L?M ??(I) [In the Formula (I), A represents a structural part containing at least one anionic group, M represents a structural part for mediating electron transfer and L represents a linker part for linking the A of the M.
    Type: Application
    Filed: April 17, 2015
    Publication date: May 4, 2017
    Inventors: Masafumi Iwamoto, Tomoya Tanaka, Eiji Watanabe, Masanobu Shiga
  • Publication number: 20170002038
    Abstract: The invention provides a cut-out method capable of suppressing production of a byproduct, wherein the object RNA oligonucleotide is not cleaved from a universal linker, which is produced in cutting out the object RNA oligonucleotide from the universal support, and capable of increasing the yield of the object RNA oligonucleotide. The RNA oligonucleotide cut-out method includes a step of bringing a universal support supporting an RNA oligonucleotide in contact with an aqueous solution containing alkylamine and a monovalent inorganic salt.
    Type: Application
    Filed: June 17, 2016
    Publication date: January 5, 2017
    Applicant: Nitto Denko Corporation
    Inventors: Shohei HORIE, Tatsuya KONISHI, Kenjiro MORI, Eri MAETA, Tsuyoshi MUKOBATA, Masafumi IWAMOTO
  • Patent number: 5594447
    Abstract: A vehicle ID radar system has a simple construction and obtains high identifying performance by making a general identification based on a plurality of responses. There are provided an antenna for obtaining a plurality of question signals from a base station radar unit, a receiver for processing the signals received from the antenna, a question code demodulator for demodulating question codes from the received signals, a question code decoder for decoding the question codes and reading responses respectively corresponding to the plurality of questions from a plurality of data bases, a response code generator for generating response signals, and a transmitter for modulating the response signals and supplying them to the antenna.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: January 14, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Ryuzaburo Usui, Masafumi Iwamoto, Kazuhiko Yamamoto, Takahiko Fujisaka, Michimasa Kondo
  • Patent number: 5287430
    Abstract: A signal discrimination device using a neural network for discriminating input signals such as radar reception signals includes an adaptive code generator means for generating codes for representing the discrimination categories. The distances between the codes for closely related categories are smaller than the distances between the codes for remotely related categories. During the learning stage, the neural network is trained to output the codes for respective inputs. The discrimination result judgment means determines the categories by comparing the outputs of the neural network and the codes for the respective categories.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: February 15, 1994
    Assignee: Mirsubishi Denki Kabushiki Kaisha
    Inventors: Masafumi Iwamoto, Takamitsu Okada, Takahiko Fujisaka, Michimasa Kondoh