Patents by Inventor John L. Willis

John L. Willis 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).

  • Biosolids flow-through thermophilic treatment process
    Patent number: 6908555
    Abstract: A method of treating wastewater sludge includes pumping, continuously, raw sludge into a first digester and treating the raw sludge at a specific temperature of between about 51° C. to 60° C.; transferring the treated wastewater sludge to a batch tank; treating the wastewater sludge in the batch tank, anaerobically, at a thermophilic temperature which is not more than 2° C. warmer than the specific temperature in the first digester; and disposing of the treated wastewater sludge as a Class A biosolid. A wastewater sludge treatment system includes a first thermophilic digester for treating raw wastewater sludge at a specific temperature in a range of between about 51° C. to 60° C., and discharging a treated wastewater sludge; a batch tank for receiving the treated wastewater sludge discharged from the first digester and for thermophilically treating sludge at a temperature in a range of between about 51° C. to 60° C. and not more than 2° C.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: June 21, 2005
    Assignee: Columbus Water Works
    Inventors: Clifford J. Arnett, Joseph B. Farrell, Daniel T. Hull, III, Steven J. Krugel, Perry L. Schafer, Billy G. Turner, Warren R. Uhte, John L. Willis
  • Biosolids flow-through thermophilic treatment process
    Publication number: 20040011718
    Abstract: A method of treating wastewater sludge includes pumping, continuously, raw sludge into a first digester and treating the raw sludge at a specific temperature of between about 51° C. to 60° C.; transferring the treated wastewater sludge to a batch tank; treating the wastewater sludge in the batch tank, anaerobically, at a thermophilic temperature which is not more than 2° C. warmer than the specific temperature in the first digester; and disposing of the treated wastewater sludge as a Class A biosolid. A wastewater sludge treatment system includes a first thermophilic digester for treating raw wastewater sludge at a specific temperature in a range of between about 51° C. to 60° C., and discharging a treated wastewater sludge; a batch tank for receiving the treated wastewater sludge discharged from the first digester and for thermophilically treating sludge at a temperature in a range of between about 51° C. to 60° C. and not more than 2° C.
    Type: Application
    Filed: April 28, 2003
    Publication date: January 22, 2004
    Applicant: Columbus Water Works
    Inventors: Clifford J. Arnett, Joseph B. Farrell, Daniel T. Hull, Steven J. Krugel, Perry L. Schafer, Billy G. Turner, Warren R. Uhte, John L. Willis
  • Apparatus for imparting enhanced directional flight to a projectile and the like
    Patent number: 4745686
    Abstract: An apparatus for imparting enhanced directional flight to a projectile and the like which includes a discontinuous sleeve which is conformably dimensioned slidably to mate with the distal end of a firearm, and an adjustable sight alignment loop which forms a sight picture in the shape of the weapon's shot pattern, is slidably mounted into receiving engagement with the discontinuous sleeve to permit a marksman to adjust the weapon in an advantageous attitude with respect to a moving target before the weapon is discharged.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: May 24, 1988
    Inventor: John L. Willis