Patents by Inventor Charles M. Murray

Charles M. Murray 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).

  • Methods of and apparatus for removing odors from process airstreams
    Patent number: 5160707
    Abstract: After aerating sewage sludge in a composting process, a stream of process air is treated to remove odors therefrom by injecting into the airstream an atomized mixture of dilute sulfuric acid and dilute surfactant to remove ammonia and odorous organic compounds therefrom. The airstream is then oxidized with bleach to remove sulfides and treated with a hydrogen peroxide solution to remove chlorine introduced by the bleach while maintaining the oxidation reaction. A dilution fan is used to further dilute the scrubbed airstream as the airstream is exhausted to the atmosphere.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: November 3, 1992
    Assignee: Washington Suburban Sanitary Commission
    Inventors: Charles M. Murray, Joel L. Thompson, Lawrence H. Hentz, Jr.
  • Methods for removing odors from process airstreams
    Patent number: 4994245
    Abstract: After aerating sewage sludge in a composting process, a stream of process air is treated to remove odors therefrom by injecting into the airstream an atomized mixture of dilute sulfuric acid and dilute surfactant to remove ammonia and odorous organic compounds therefrom. The airstream is then oxidized with bleach to remove sulfides and treated with a hydrogen peroxide solution to remove chlorine introduced by the bleach while maintaining the oxidation reaction. A dilution fan is used to further dilute the scrubbed airstream as the airstream is exhausted to the atmosphere.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: February 19, 1991
    Assignee: Washington Suburban Sanitary Commission
    Inventors: Charles M. Murray, Joel L. Thompson, Lawrence H. Hentz, Jr.