Patents by Inventor Heinz D. Bernhard

Heinz D. Bernhard 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).

  • Continuous process for the production of highly concentrated spinning solutions of acrylonitrile polymers and a suitable device for this purpose
    Patent number: 4420572
    Abstract: The invention relates to a process and device for the production of highly concentrated spinning solutions from acrylonitrile polymers, where the dissolving is carried out in one step in a stirred mixing vessel, which has a disc-shaped stirrer rotating in a horizontal plane, the polymeric material to be dissolved and the solvent are metered in separately at room temperature into the stirring vortex which is formed, and the temperature of the solution being formed is maintained at a constant preset value in the range from 60.degree. to 120.degree. C. by controlling the peripheral velocity of the stirrer.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: December 13, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ernst Horoldt, Helmut Vollmuller, Heinz D. Bernhard, Harald M. Strobel