Patents by Inventor Takeshi Tomishima

Takeshi Tomishima 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 continuous polycondensation of higher aliphatic .omega.-amino acid particles
    Patent number: 4546171
    Abstract: A higher aliphatic polyamide is obtained by a method wherein particles of powdered or granular 11-aminoundecanoic acid and/or 12-aminododecanoic acid are enveloped in an inert gas, melted, and then immediately polycondensed by heating.This method is realized by an apparatus including a melting device for melting the powder or granules and a tubular polycondensation reactor connected to the melting device. The melting device is constituted by a container having an inlet and an outlet for supplying and discharging the powder or granules, respectively, a piston provided vertically in the container, and a melting chamber provided below the piston and incorporating therein a lattice-shaped hotplate.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: October 8, 1985
    Assignee: Toray Industries, Inc.
    Inventors: Eizo Gotah, Takeshi Tomishima, Tadao Tsutsumi, Yoshiyuki Komuro