Patents by Inventor Howard E. Dunn

Howard E. Dunn 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).

  • Water purification by chlorinating, holding, and aerating
    Patent number: 4314906
    Abstract: A method of preparing water for human consumption by chlorinating water obtained from reservoirs, lakes, or streams, which water contains microorganisms and naturally occurring or pollutant organic precursor substances known to react with chlorine to yield one or more halogenated organic compounds, holding the chlorinated water for a period of time sufficient for the chlorine to react with said precursors to produce halogenated organic compounds, and then removing the halogenated organic compounds from the water by aeration. Such treatment also removes any bromine-containing organic compounds contained in the water and any chlorine derivatives thereof formed in the chlorine treatment.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: February 9, 1982
    Assignee: George Koch Sons, Inc.
    Inventors: Howard E. Dunn, Robert L. Koch, II
  • Safety device for self propelled land vehicles
    Patent number: D262789
    Type: Grant
    Filed: December 7, 1978
    Date of Patent: January 26, 1982
    Inventor: Howard E. Dunn