Patents by Inventor David A. Kirchgessner

David A. Kirchgessner 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).

  • Lignosulfonate-modified calcium hydroxide for SO.sub.2 control during furnace injection
    Patent number: 5427994
    Abstract: A method is provided for preparing particulate calcium hydroxide/calcium lignosulfonate sorbent by contacting calcium oxide with water.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: June 27, 1995
    Assignee: The United States of America as represented by the Environmental Protection Agency
    Inventors: David A. Kirchgessner, Jeffrey M. Lorrain
  • Lignosulfonate-modified calcium hydroxide for SO.sub.2 control during furnace injection
    Patent number: 5135729
    Abstract: A method is provided for removing sulphur-containing gases from fossil fuel-fired combustors comprising the step of introducing sorbent particles modified with lignosulfonates into the exhaust gases.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: August 4, 1992
    Assignee: United States of America Environmental Protection Agency
    Inventors: David A. Kirchgessner, Jeffrey M. Lorrain
  • Lignosulfonate-modified calcium hydroxide for SO2 control during furnace injection
    Patent number: 4882309
    Abstract: A method is provided for removing sulphur-containing gases from fossil fuel-fired combustors comprising the step of introducing sorbent particles modified with lignosulfonates into the exhaust gases.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: November 21, 1989
    Assignee: United States of America Environmental Protection Agency
    Inventors: David A. Kirchgessner, Jeffrey M. Lorrain
  • Lignosulfonate-modified calcium hydroxide for SO.sub.2 control during furnace injection
    Patent number: 4786485
    Abstract: A method is provided for removing sulphur-containing gases from fossil fuel-fired combustors comprising the step of introducing sorbent particles modified with lignosulfonates into the exhaust gases.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: November 22, 1988
    Assignee: The United States of America as represented by the United States Environmental Protection Agency
    Inventors: David A. Kirchgessner, Jeffrey M. Lorrain