Patents by Inventor Hans J. Hoppe

Hans J. Hoppe 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).

  • Thin walled tubing formed of a melt spinnable synthetic polymer and process for the manufacturing thereof
    Patent number: 4305983
    Abstract: Thin walled tubing formed of a melt spinnable synthetic polymer having a flow-through cross-section amounting to 30 to 95% of the total tubular cross-section and a breaking elongation of less than 100% prepared by melt spinning a synthetic polymer so as to form a tube and then drawing off the tube thus formed at a velocity which is greater than 3500 m/min. Preferably the process is carried out under utilization of the phenomena of natural fiber bending whereby the distance between the spinning means and the take-off means can be decreased.
    Type: Grant
    Filed: September 21, 1979
    Date of Patent: December 15, 1981
    Assignee: Akzo NV
    Inventors: Hans J. Hoppe, Karl Ostertag