Patents by Inventor Hans-Jurgen Kloppner

Hans-Jurgen Kloppner 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 of continuously making flexible, heat insulated metal tubing
    Patent number: 4345363
    Abstract: Extruded, drawn and coiled copper tubing with wall thickness of 0.7 to 2 mm is soft annealed, straightened and jacketed in an extruder with a blend of polyvinyl chloride, chalk, a plasticizer and other additives for lubrication and stabilization. The jacket has inwardly extending ribs defining channels inbetween to enhance heat insulation.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: August 24, 1982
    Assignee: Kabel und Metallwerke Gutehoffnungshutte AG
    Inventors: Ottmar Leuchs, Hans-Jurgen Kloppner, Otto Uhlmann