Patents by Inventor Egon Freytag

Egon Freytag 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).

  • Device for the surface treatment of thermoplastic moldings by corona discharge
    Patent number: 4467200
    Abstract: An electric discharge corona discharge device is disclosed which is useful for rendering of the surface of plastic molded parts capable of being adhesively bound to another part. The device includes flexible, limp counter electrodes which can be adjusted so as to maintain a substantially uniform discharge over the plastic part surface. The discharge is obtained with alternating current and the base underneath the plastic part constitutes the base electrode.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: August 21, 1984
    Assignees: Klaus Kalwar, Firma Carl Freudenberg
    Inventors: Klaus Kalwar, Egon Freytag, Lothar Hirschinger, Klaus Ebner