Patents by Inventor Shogo NISHIURA

Shogo NISHIURA 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).

  • Powdery paper-strengthening agent, paper-strengthening agent solution, and paper
    Patent number: 11795620
    Abstract: A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: October 24, 2023
    Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke Kambara, Daisuke Fujioka, Shogo Nishiura
  • POWDERY PAPER-STRENGTHENING AGENT, PAPER-STRENGTHENING AGENT SOLUTION, AND PAPER
    Publication number: 20230065141
    Abstract: A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.
    Type: Application
    Filed: October 28, 2022
    Publication date: March 2, 2023
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke KAMBARA, Daisuke FUJIOKA, Shogo NISHIURA
  • POWDERY PAPER STRENGTHENING AGENT, METHOD FOR PRODUCING POWDERY PAPER STRENGTHENING AGENT, PAPER STRENGTHENING AGENT SOLUTION AND PAPER
    Publication number: 20220169767
    Abstract: A powdery paper-strengthening agent, comprising a branched (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 8,000,000 and a molecular weight distribution of 1.4 to 3.0, wherein the branched (meth)acrylamide-based polymer (A) comprises, as constituent monomers, a (meth)acrylamide (a1), a crosslinkable unsaturated monomer (a2), and at least one of a cationic unsaturated monomer (a3) and an anionic unsaturated monomer (a4), and wherein a content of unreacted (a1) component is 1,000 ppm or less.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 2, 2022
    Applicant: Arakawa Chemical Industries, Ltd.
    Inventors: Shogo NISHIURA, Daisuke FUJIOKA, Keisuke OKADA
  • POWDERY PAPER-STRENGTHENING AGENT, PAPER-STRENGTHENING AGENT SOLUTION, AND PAPER
    Publication number: 20210269982
    Abstract: A powdery paper-strengthening agent comprising a branched (meth)acrylamide-based polymer (A).
    Type: Application
    Filed: September 9, 2019
    Publication date: September 2, 2021
    Applicant: ARAKAWA CHEMICAL INDUSTRIES, LTD.
    Inventors: Ryusuke KAMBARA, Daisuke FUJIOKA, Shogo NISHIURA