Patents by Inventor David P. Jackaman

David P. Jackaman 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).

  • Liquid metal processing
    Patent number: 5058865
    Abstract: A vessel is provided having a first chamber 1 open to atmospheric pressure for receiving liquid metal and a second chamber 2 from which the metal is dispensed interconnected with the first chamber. The second chamber is sealed and coupled to means 4, 6 for reducing the pressure therein to sub-atmospheric whereby to create a higher level of metal in said second than said first chamber.The first and second chambers may be interconnected via a refractory filter.
    Type: Grant
    Filed: July 24, 1990
    Date of Patent: October 22, 1991
    Assignee: British Steel plc
    Inventors: Thomas Robertson, David P. Jackaman, Richard J. Hawkins