Patents by Inventor Kazumasa Shimizu

Kazumasa Shimizu 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 manufacturing lignin for carbon fiber spinning
    Patent number: 5344921
    Abstract: A method for manufacturing lignin for carbon fiber spinning, comprising subjecting to heat treatment in a non-oxidizing atmosphere a phenolated lignin obtained by phenolation of lignin dissolved out in delignification of a woody material, or a phenolated lignin derived from digestion of a woody material with a phenol.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: September 6, 1994
    Assignee: Forestry and Forest Products Research Institute, Ministry of Agriculture, Forestry and Fisheries
    Inventors: Kenichi Sudo, Kazumasa Shimizu