Patents by Inventor Willy F. Poppe

Willy F. Poppe 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).

  • Process for continuous production of thin polyurethane foam layers
    Patent number: 3939235
    Abstract: The invention pertains to a process for the continuous production of thin polyurethane foam layers, in which a band-like supporting layer is moved longitudinally and locally guided so as to take a nearly cylindrical shape, the axis of which is horizontal and perpendicular to the general direction of the band motion, and a reacting mixture is projected on the supporting layer by means of a vertical, rotating projection disk, reciprocating along the axis of the said cylindrical shape.
    Type: Grant
    Filed: March 19, 1974
    Date of Patent: February 17, 1976
    Assignee: Serpo
    Inventor: Willy F. Poppe