Patents by Inventor Seiya ASHIBE

Seiya ASHIBE 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).

  • Method for producing cyclic disulfonic acid ester compound
    Patent number: 11802119
    Abstract: Provided is a novel production method capable of easily producing a cyclic disulfonic acid ester compound. This method for producing a cyclic disulfonic acid ester compound comprises reacting a specific sulfonic acid compound with a specific sulfuric acid ester compound.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: October 31, 2023
    Assignee: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Seiji Bando, Hirotake Moriyama, Seiya Ashibe
  • METHOD FOR PRODUCING ALKANEDISULFONIC ACID COMPOUND
    Publication number: 20230159443
    Abstract: Provided is an industrially advantageous method for producing an alkanedisulfonic acid compound easily and inexpensively with a high yield. The present invention is a method for producing an alkanedisulfonic acid compound, comprising reacting at least one alkanesulfonic acid compound having a specific structure and sulfur trioxide in the presence of at least one member selected from the group consisting of a sulfoxide compound and sulfone compound having a specific structure to thereby obtain an alkanedisulfonic acid compound.
    Type: Application
    Filed: February 8, 2021
    Publication date: May 25, 2023
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Yusaku MASUHARA, Seiya ASHIBE
  • METHOD FOR PRODUCING METHYLENE DISULFONATE COMPOUND
    Publication number: 20230150967
    Abstract: Provided is an industrially advantageous method for producing a methylene disulfonate compound easily and inexpensively using fewer raw materials. The method for producing a methylene disulfonate compound of the present invention comprises step A of reacting at least one alkanesulfonic acid compound and sulfur trioxide in the presence of at least one member selected from the group consisting of a sulfoxide compound and a sulfone compound to thereby obtain reactant A comprising an alkanedisulfonic acid compound, and step B of reacting reactant A obtained in step A and a formaldehyde compound in the presence of sulfur trioxide to thereby obtain a methylene disulfonate compound.
    Type: Application
    Filed: February 8, 2021
    Publication date: May 18, 2023
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Seiya ASHIBE, Hirotake MORIYAMA
  • METHOD FOR PRODUCING METHYLENE DISULFONATE COMPOUND
    Publication number: 20220251059
    Abstract: Provided is a novel production method capable of easily producing a methylene disulfonate compound. The method for producing a methylene disulfonate compound comprises reacting a specific sulfonic acid compound with a formaldehyde compound in the presence of sulfur trioxide.
    Type: Application
    Filed: July 22, 2020
    Publication date: August 11, 2022
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Seiya ASHIBE, Seiji BANDO, Yusaku MASUHARA
  • METHOD FOR PRODUCING CYCLIC DISULFONIC ACID ESTER COMPOUND
    Publication number: 20220251060
    Abstract: Provided is a novel production method capable of easily producing a cyclic disulfonic acid ester compound. This method for producing a cyclic disulfonic acid ester compound comprises reacting a specific sulfonic acid compound with a specific sulfuric acid ester compound.
    Type: Application
    Filed: July 22, 2020
    Publication date: August 11, 2022
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Seiji BANDO, Hirotake MORIYAMA, Seiya ASHIBE