Patents by Inventor Takashi Asaeda

Takashi Asaeda 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 dissolving cellulose in organic solvents and resulting cellulose solutions
    Patent number: 4597798
    Abstract: Method for preparing a cellulose solution wherein cellulose is dissolved in a mixed solvent which is consisted essentially of an aliphatic quaternary ammonium halide, containing a lower alkyl group and a halogen, and an organic solvent capable of dissolving the halide. The dissolving process must be carried out within a heating temperature range, between 50.degree. C. and 100.degree. C., particularly preferable between 70.degree. C. and 95.degree. C., so as to keep the degree of polymerization of the cellulose at a high level.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: July 1, 1986
    Assignee: Tachikawa Research Institute
    Inventors: Masami Kamata, Iwao Tabushi, Saichi Morimoto, Takashi Asaeda, Yoshikazu Aoki