Patents by Inventor Donald Philips Lewis

Donald Philips Lewis 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).

  • Method and apparatus for controlling zebra mussels and other bivalves using ultraviolet radiation
    Patent number: 6149343
    Abstract: A method and apparatus for controlling zebra mussels and other bivalves using UV light from a medium pressure UV lamp which is located in a chamber having therein water in which the bivalves are located. The medium pressure UV lamp provides an intensity of UV light measured at a wavelength of 254 nm of at least approximately 6830 .mu.W/cm.sup.2 in the water. The medium pressure UV lamp provides a dose of UV light measured at a wavelength of 254 nm of at least approximately 0.1 W.sec/cm.sup.2 in the water.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: November 21, 2000
    Assignee: Trojan Technologies, Inc.
    Inventors: Donald Philips Lewis, G. Elliot Whitby
  • Method and apparatus for controlling zebra and related mussels using ultraviolet radiation
    Patent number: 5655483
    Abstract: A method for controlling zebra mussels and other bivalves using UV light at a wavelength of 254 nm. One or more low pressure UV lamps provide an intensity of UV light in the range of about 13,400 .mu.W/cm.sup.2 to about 22,300 .mu.W/cm.sup.2 in the water wherein the bivalves may be located. The one or more low pressure UV amps provide a dose of UV light in the range of about 0.08 W.sec/cm.sup.2 to about 2.6 W.sec/cm.sup.2 in the water wherein the bivalves may be located. The dose is provided for a period of time in the range from about 4.5 seconds to about 116 seconds.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: August 12, 1997
    Assignees: Aquatic Sciences Inc., Elsag Bailey (Canada), Inc.
    Inventors: Donald Philips Lewis, G. Elliott Whitby