Patents by Inventor James Barrett McDonald

James Barrett McDonald 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).

  • Removable closure for an opening in an aluminum refining pot
    Patent number: 5667648
    Abstract: A closure is made of a flexible fabric material designed to withstand a temperature in the range of 1800.degree. F. as is present within a pot employed to conduct the Hall-Heroult process for deriving aluminum from alumina. The closure, in a preferred embodiment, includes an elongated hook allowing it to be hung over the opening of the pot and also includes a gripping handle allowing the closure to be manipulated. A peripheral bulbous seal enhances the sealing effect about the opening in the pot.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: September 16, 1997
    Assignees: Michael J. McDonald, Ben N. McDonald
    Inventor: James Barrett McDonald