Patents by Inventor Ryoji Sugamiya

Ryoji Sugamiya 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).

  • Process for purifying monochloroacetic acid
    Patent number: 4383121
    Abstract: A mixture containing monochloroacetic acid and dichloroacetic acid as the main components are admixed with 5-25% by weight of water on the basis of sum total of monochloroacetic acid, dichloroacetic acid and water, and subjected to adiabatic cooling under a pressure of 133 to 2,660 Pa, whereby monochloroacetic acid is crystallized with a high purity.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: May 10, 1983
    Assignee: Tsukishima Kaikai Co., Ltd.
    Inventors: Ryoji Sugamiya, Kazuto Nakamaru, Keizo Takegami, Koji Miwa, Minoru Morita