Patents by Inventor Katsuma Hatta

Katsuma Hatta 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 chlorinating xylenols
    Patent number: 4245127
    Abstract: Chlorination of xylenols with a chlorinating agent such as sulfuryl chloride in the presence of a metal chloride catalyst is conducted in further presence of 0.001 to 1% by weight of a sulfur compound, based on the xylenols, whereby industrially useful xylenols are obtained safely with a high selectivity and high yield.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: January 13, 1981
    Assignee: Seitetsu Kagaku Co., Ltd.
    Inventors: Teiziro Matsumoto, Moriyasu Matsuda, Hiroshi Mizokami, Tsuneo Kibamoto, Katsuma Hatta