Patents by Inventor John Kevin Pollard

John Kevin Pollard 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).

  • Waste materials processing apparatus and method
    Patent number: 6176188
    Abstract: A method is provided for controlling the hydrocarbon release rate during thermal processing of materials having a variable caloric content.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: January 23, 2001
    Inventors: Paul H. Stevers, Roger D. Eshleman, Earl H. Sigman, John Kevin Pollard
  • Waste material processing apparatus and method
    Patent number: 6055916
    Abstract: A material processing apparatus includes a casing having a top and bottom and a plurality of sides defining a pyrolysis chamber for receiving and pyrolyzing feed materials therein into fluid materials and a mass of refractory material disposed upon the bottom of the casing and spaced below the top thereof and extending between its sides. The refractory mass includes an upper surface defining a bottom of the pyrolysis chamber and having an end spaced from a first one of the casing sides to define an ash residue collection cavity therebetween. The apparatus also includes a system of tunnels defined within the refractory mass being spaced below the upper surface thereof.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: May 2, 2000
    Inventors: Paul H. Stevers, Roger D. Eshleman, Earl H. Sigman, John Kevin Pollard
  • Waste material processing apparatus
    Patent number: 6050204
    Abstract: A material processing apparatus includes a casing having a top and bottom and a plurality of sides defining a pyrolysis chamber for receiving and pyrolyzing feed materials therein into fluid materials and a mass of refractory material disposed upon the bottom of the casing and spaced below the top thereof and extending between its sides. The refractory mass includes an upper surface defining a bottom of the pyrolysis chamber and having an end spaced from a first one of the casing sides to define an ash residue collection cavity therebetween. The apparatus also includes a system of tunnels defined within the refractory mass being spaced below the upper surface thereof.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: April 18, 2000
    Inventors: Paul H. Stevers, Roger D. Eshleman, Earl H. Sigman, John Kevin Pollard