Patents by Inventor Douglas Caldwell

Douglas Caldwell 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).

  • Publication number: 20050045771
    Abstract: The present invention allows a payload to be launched from the exterior of a conventional launch vehicle with little integration expense. In one example, the invention includes an aerodynamic fairing having an internal cavity to contain a payload, a mounting adapter to attach the fairing to an exterior surface of a launch vehicle, and a release mechanism to separate the payload from the launch vehicle out of the fairing cavity during the launch vehicle's flight.
    Type: Application
    Filed: August 28, 2003
    Publication date: March 3, 2005
    Inventor: Douglas Caldwell
  • Patent number: 6447740
    Abstract: The invention is directed to a process for oxidizing gaseous pollutants in a flue gas stream composed of flue gases, water vapour and one or more gaseous pollutants selected from the group consisting of SO2, NO, NO2, H2S, and mercury vapour, the oxidized form of the pollutants being more readily removable from the flue gas stream by water absorption than the non-oxidized form thereof, comprising: (a) injecting sufficient chlorine in a gaseous form, a liquid form, or as a chlorine water solution, into the flue gas stream while the flue gas stream is at a temperature greater than 100° C.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: September 10, 2002
    Assignee: ISCA Management Ltd.
    Inventors: Douglas Caldwell, John W. Biggar, Brian W. McIntyre