Patents by Inventor Donald A. Pehrson

Donald A. Pehrson 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 making a building material
    Patent number: 5375777
    Abstract: A process for preparing a building material from waste material. The waste material is ground and then mixed with an epoxy resin. The mixture of the ground waste material and the epoxy resin is then mixed with a silica material.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: December 27, 1994
    Inventor: Donald A. Pehrson