Patents by Inventor Katsumi Horikosi

Katsumi Horikosi 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).

  • Apparatus for producing polyarylenesulfides
    Patent number: 4841019
    Abstract: By the use of an apparatus for producing a polyarylenesulfide comprising a dehydrator vessel and/or a reactor vessel wherein at least liquid-contacting parts thereof are fabricated of titanium, a clean polyarylenesulfide containing no foreign matter can be obtained by reacting a hydrous alkali metal sulfide with a dihaloaromatic compound in an aprotic polar organic solvent.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: June 20, 1989
    Assignee: Kureha Kogyo Kabushiki Kaisha
    Inventors: Takao Iwasaki, Katsumi Horikosi