Patents by Inventor Frederick H. Kurtz

Frederick H. Kurtz 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).

  • Patent number: 6387281
    Abstract: There is disclosed a process for treating sewage or similar organic sludge to produce a pasteurized and dried product comprising the steps of: dividing the sludge into at least one first portion and at least one second portion; drying the first portion so that the first portion has a higher dry solids content than that of the second portion; mixing the fist portion and the second portion to produce a mixture having a dry solids content which is intermediate between that of the first and second portions; adding an alkaline admixture to the mixture in order to pasteurize the mixture and thereby produce the product without employing subsequent drying by aeration.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: May 14, 2002
    Assignee: R3 Management Limited
    Inventors: Robin Millard, Frederick H. Kurtz
  • Publication number: 20010023853
    Abstract: There is disclosed a process for treating sewage or similar organic sludge to produce a pasteurized and dried product comprising the steps of:
    Type: Application
    Filed: March 23, 2001
    Publication date: September 27, 2001
    Inventors: Robin Millard, Frederick H. Kurtz
  • Patent number: 5853450
    Abstract: The method of treating wastewater or bioorganic sludges containing odor, animal viruses, pathogenic bacteria, and parasites to produce a bioactive but stabilized product that is useful as a soil substitute or as a fertilizer which can be applied directly to lands which consists essentially of the following steps: mixing said sludge with at least one alkaline material, wherein the amount of added material mixed with said sludge is sufficient to raise the pH of said mixture to pH 12, and raise the conductivity to disinfect and stabilize the sludge, and adding green waste at different process locations so that a biological action occurs converting the greenwaste into a soil-like granular product with improved odor over that of the treated municipal sludge alone or a composted greenwaste alone.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: December 29, 1998
    Assignee: Medical College of Ohio
    Inventors: Jeffrey C. Burnham, Frederick H. Kurtz