Patents by Inventor Bruce T. MacPhail

Bruce T. MacPhail 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).

  • Dual stage ceramic foam filtration system and method
    Patent number: 5673902
    Abstract: There is provided a dual stage ceramic foam molten metal filtration system and method. Coarse and fine filters are mounted adjacent to one another in a molten metal flow path. A convection preheat apparatus provides preheat for both filters. A vent structure is included to vent air which may be trapped in a gap which is formed between the two filters.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: October 7, 1997
    Assignee: Selee Corporation
    Inventors: Leonard S. Aubrey, Clifton L. Oliver, Bruce T. MacPhail