Patents by Inventor Robert C. Dadd

Robert C. Dadd 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).

  • Patent number: 4230571
    Abstract: A method and apparatus for the purification of water with ozone and ultraviolet radiation. Oxygen-containing gas, such as air, is directed to flow in a confined path past an untraviolet radiation source, such as a mercury vapor lamp. The absorption of ultraviolet radiation by oxygen produces ozone which is entrained in the flowing gas. The gas is next mixed with the contaminated water and the mixture of water and ozone is then directed past the same ultraviolet source in a path isolated from the confined path of gas alone. The ozone in the water acts directly to kill bacteria and viruses and to oxidize undersirable compounds in the water. The ultraviolet radiation also acts directly to kill bacteria and viruses in the water. Additionally the ultraviolet radiation acts as a catalyst for the disinfecting and oxidizing action of the ozone, so that water purification occurs much faster than would occur if the ozone were acting alone.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: October 28, 1980
    Inventor: Robert C. Dadd