Patents by Inventor Bernhard Kowald

Bernhard Kowald 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).

  • High frequency plastic welding flux
    Patent number: 3967999
    Abstract: A high-frequency plastic welding flux, characterized in that the dispersion contains a redispersible powder of a polymer prepared by suspension polymerization which consists of polyvinyl chloride and/or copolymers of vinyl chloride with monomers copolymerizable with vinyl chloride; as well as a process for using this flux for high-frequency welding.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: July 6, 1976
    Assignee: Henkel & Cie G.m.b.H.
    Inventors: Dieter Sommerfeld, Bernhard Kowald, Monika Winkels