Patents by Inventor Donald R. Jorgensen

Donald R. Jorgensen 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).

  • Method of mixing chemically bonded foundry sand by vibratory action
    Patent number: 4353651
    Abstract: A method of mixing chemically bonded foundry sand by introducing the sand and binders into a lengthwise extending spiral shaped mixing trough and vibrating the trough is disclosed.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: October 12, 1982
    Inventors: William H. Moore, Donald R. Jorgensen