Patents by Inventor Kazuhiro SAMBAI

Kazuhiro SAMBAI 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 mercaptophenol compound and intermediate of said compound
    Patent number: 10851052
    Abstract: A production method in which a mercaptophenol compound is obtained using an industrially preferred sulfur atom introduction reaction, and intermediate compounds of the mercaptophenol compound are provided. A method for producing a mercaptophenol compound in which a phenyl carbamate compound is produced using a phenol compound as a raw material, and then a sulfur atom is regioselectively introduced by a reaction with sulfur monochloride, and a phenyl mercaptocarbamate compound is produced as an intermediate.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: December 1, 2020
    Assignee: Kumiai Chemical Industry Co., Ltd.
    Inventor: Kazuhiro Sambai
  • METHOD FOR PRODUCING MERCAPTOPHENOL COMPOUND AND INTERMEDIATE OF SAID COMPOUND
    Publication number: 20200277257
    Abstract: A production method in which a mercaptophenol compound is obtained using an industrially preferred sulfur atom introduction reaction, and intermediate compounds of the mercaptophenol compound are provided. A method for producing a mercaptophenol compound in which a phenyl carbamate compound is produced using a phenol compound as a raw material, and then a sulfur atom is regioselectively introduced by a reaction with sulfur monochloride, and a phenyl mercaptocarbamate compound is produced as an intermediate.
    Type: Application
    Filed: February 22, 2019
    Publication date: September 3, 2020
    Applicant: KUMIAI CHEMICAL INDUSTRY CO., LTD.
    Inventor: Kazuhiro SAMBAI