Patents by Inventor C. Ray Campbell

C. Ray Campbell 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 for the treatment of animal waste and products made therefrom
    Publication number: 20030141245
    Abstract: A method of treating animal waste includes separating the solids by flocculation and dissolved air flow, followed by screening of the solids to separate them from the waste water. The resulting solid portion is used as the basis for manufacturing value-added products including organic fertilizer, liquid fertilizer, soil amendments and soilless media.
    Type: Application
    Filed: February 7, 2002
    Publication date: July 31, 2003
    Inventors: Lewis M. Fetterman, C. Ray Campbell