Patents by Inventor Guy M. Gustafson

Guy M. Gustafson 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).

  • Manure slurry pre-treatment method and apparatus
    Patent number: 6146507
    Abstract: A method and apparatus for pre-treatment of a fresh manure slurry stream. The method alters gas production during subsequent treatment or holding. The method passes the stream through a pre-treatment zone in which the slurry is subjected to alternating electrical current depositing energy from about 1.1.times.10.sup.-2 J/cm.sup.3 to 4.1.times.10.sup.-1 J/cm.sup.3. The apparatus includes first and second spaced apart electrodes of inert material which define a pre-treatment zone between the electrodes and preferably induce turbulence in the stream within the pre-treatment zone.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: November 14, 2000
    Inventor: Guy M. Gustafson