Patents by Inventor Hidemasa Suetsugu

Hidemasa Suetsugu 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 of crystallizing tetrabromobisphenol A
    Patent number: 6383127
    Abstract: A method of crystallizing tetrabromobisphenol A is described, which comprises continuously and simultaneously feeding a methanolic tetrabromobisphenol A solution and water separately to a first crystallizer to obtain a slurry in which a part of the tetrabromobisphenol A is crystallized and continuously and simultaneously feeding said slurry and water separately to a second crystallizer to crystallize substantially the whole amount of the tetrabromophisphenol A.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: May 7, 2002
    Assignee: Tosoh Corporation
    Inventors: Hiroshi Fushihara, Hidemasa Suetsugu, Takahiro Matsunaga
  • Method of crystallizing tetrabromobisphenol A
    Publication number: 20010049456
    Abstract: A method of crystallizing tetrabromobisphenol A is described, which comprises continuously and simultaneously feeding a methanolic tetrabromobisphenol A solution and water separately to a first crystallizer to obtain a slurry in which a part of the tetrabromobisphenol A is crystallized and continuously and simultaneously feeding said slurry and water separately to a second crystallizer to crystallize substantially the whole amount of the tetrabromophisphenol A.
    Type: Application
    Filed: May 15, 2001
    Publication date: December 6, 2001
    Inventors: Hiroshi Fushihara, Hidemasa Suetsugu, Takahiro Matsunaga