Patents by Inventor Paul H. Schwartz

Paul H. Schwartz 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).

  • Forming device with first and second material proportioning means
    Patent number: 3942924
    Abstract: A forming device and method is disclosed herein that is particularly useful for forming large parts of polyurethane material. The forming device includes a proportioner that meters relative amounts of materials through separate supply sources to a mixer where the materials are combined and then supplied to a mold, the mold being then rotated to displace the materials throughout the mold to form therefrom a part having a preselected shape. Where the materials to be combined are polyurethane components, the components are combined and quickly supplied to the mold to displace and cure the part while in said mold.
    Type: Grant
    Filed: October 18, 1973
    Date of Patent: March 9, 1976
    Assignee: Dura Products, Inc.
    Inventor: Paul H. Schwartz