Patents by Inventor Franz Prager

Franz Prager 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).

  • Patent number: 3931098
    Abstract: Means for producing fiber-reinforced foam plastic webs, panels, sandwich panels and the like from continuous rovings and a foam reaction mixture. Rovings are incorporated into a foam product or core by means of an air nozzle coupled to and adjustable in its position to the nozzle of a mixing head for ejecting the foam reaction mixture.
    Type: Grant
    Filed: February 12, 1974
    Date of Patent: January 6, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Herweg, Franz Prager