Patents by Inventor Greg R. Wellen

Greg R. Wellen 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 producing activated carbon
    Patent number: 5858911
    Abstract: Disclosed is a rigid fine-celled foam composition and a method of producing it. The foam composition is nontoxic, environmentally friendly, has improved absorption/adsorption and retention of liquids, is not as hard as prior art foams, does not include polymerization by-products detrimental to flower and plant life, and is a foamed mixture of a caustic silicate solution derived from the caustic digestion of rice hull ash having diffused activated carbon particles from thermal pyrolysis of rice hulls rather than from commercial sodium silicate solutions. Valuable by-products of commodity grade are obtained including activated carbon and sodium fluoride.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: January 12, 1999
    Assignee: Agritec, Inc.
    Inventors: Clyde W. Wellen, Douglas K. Stephens, Greg R. Wellen
  • Fine-celled foam composition and method
    Patent number: 5714000
    Abstract: Disclosed is a rigid fine-celled foam composition and a method of producing it. The foam composition is nontoxic, environmentally friendly, has improved absorption/adsorption and retention of liquids, is not as hard as prior art foams, does not include polymerization by-products detrimental to flower and plant life, and is a foamed mixture of a caustic silicate solution derived from the caustic digestion of rice hull ash having diffused activated carbon particles from thermal pyrolysis of rice hulls rather than from commercial sodium silicate solutions. Valuable by-products of commodity grade are obtained including activated carbon and sodium fluoride.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: February 3, 1998
    Assignee: Agritec, Inc.
    Inventors: Clyde W. Wellen, Douglas K. Stephens, Greg R. Wellen