Patents by Inventor John H. O'Leary

John H. O'Leary 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).

  • Multi-stage process for reducing the concentration of pollutants in an effluent
    Patent number: 5057293
    Abstract: A process is presented for reducing the concentration of pollutants in an effluent from the combustion of a carbonaceous fuel. The process comprises introducing a first treatment agent into the effluent at a first temperature zone to reduce the concentration of a first pollutant and introducing a second treatment agent into the effluent at a second temperature zone to reduce the concentration of either the first pollutant or a second pollutant, wherein the first and second treatment agents are introduced under conditions effective to reduce the effluent pollution index.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: October 15, 1991
    Assignee: Fuel Tech, Inc.
    Inventors: William R. Epperly, Jeremy D. Peter-Hoblyn, George F. Shulof, Jr., James C. Sullivan, Barry N. Sprague, John H. O'Leary
  • Process for nitrogen oxides reduction and minimization of the production of other pollutants
    Patent number: 5017347
    Abstract: A process for the reduction of nitrogen oxides in an effluent from the combustion of a carbonaceous fuel while minimizing the production of other pollutants is presented. The process comprises introducing (most commonly by injecting) a nitrogen oxides reducing treatment agent into an effluent according to a nitrogen oxides reducing treatment regimen under conditions such that the treatment agent is operating on the high temperature or right side of its nitrogen oxides reduction versus effluent temperature curve, especially on the high temperature or right side of the curve plateau.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: May 21, 1991
    Assignee: Fuel Tech, Inc.
    Inventors: William R. Epperly, James C. Sullivan, Barry N. Sprague, John H. O'Leary
  • Process for nitrogen oxides reduction with minimization of the production of other pollutants
    Patent number: 4902488
    Abstract: A process for the reduction of nitrogen oxides in an effluent from the combustion of a carbonaceous fuel while minimizing the production of other pollutants is presented. The process comprises introducing a nitrogen oxides reducing treatment agent comprising an ammonium salt of an organic acid having a carbon to nitrogen ratio of greater than 1:1 into an effluent according to a nitrogen oxides reducing treatment regimen under condition such that the treatment agent is operating on the high temperature or right side of its nitrogen oxides reduction versus effluent temperature curve, especially on the high temperature or right side of the curve plateau.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: February 20, 1990
    Assignee: Fuel Tech, Inc.
    Inventors: William R. Epperly, John H. O'Leary, James C. Sullivan, Barry N. Sprague
  • Process for nitrogen oxides reduction with minimization of the production of other pollutants
    Patent number: 4877590
    Abstract: A process for the reduction of nitrogen oxides in an effluent from the combustion of a carbonaceous fuel while minimizing the production of other pollutants is presented. The process comprises introducing a nitrogen oxides reducing treatment agent comprising a hydrocarbon into an effluent at a temperature below about 1450.degree. F. according to a nitrogen oxides reducing treatment regimen under conditions such that the hydrocarbon treatment agent is operating on the high temperature or right side of its nitrogen oxides reduction versus effluent temperature curve, especially on the high temperature or right side of the curve plateau.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: October 31, 1989
    Assignee: Fuel Tech, Inc.
    Inventors: William R. Epperly, John H. O'Leary, James C. Sullivan, Barry N. Sprague
  • Process for nitrogen oxides reduction and minimization of the production of other pollutants
    Patent number: 4780289
    Abstract: A process for the reduction of nitrogen oxides in an effluent from the combustion of a carbonaceous fuel while minimizing the production of other pollutants is presented. The process comprises introducing (most commonly by injecting) a nitrogen oxides reducing treatment agent into an effluent according to a nitrogen oxides reducing treatment regimen under conditions such that the treatment agent is operating on the high temperature or right side of its nitrogen oxides reduction versus effluent temperature curve, especially on the high temperature or right side of the curve plateau.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: October 25, 1988
    Assignee: Fuel Tech, Inc.
    Inventors: William R. Epperly, John H. O'Leary, James C. Sullivan