Patents by Inventor Bradley Duane Medcalf

Bradley Duane Medcalf 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).

  • Patent number: 6110249
    Abstract: A filter element is adapted to be located in a gas stream. The filter element comprises a substrate having a structure selected from the group consisting of scrimed needled felt, scrimless needled felt, woven fabric and mesh. The substrate comprises at least two different materials. A first one of the materials has a first melting temperature. A second one of the materials has a second melting temperature lower than the first melting temperature. An expanded polytetrafluoroethylene filtering membrane is adapted to be located upstream relative to the substrate in the gas stream and supported by the substrate. The substrate is attached to the filtering membrane by the second material of the substrate melted to engage the membrane and fix the membrane to the substrate.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: August 29, 2000
    Assignee: BHA Technologies, Inc.
    Inventors: Bradley Duane Medcalf, James Roy Doehla, Anthony Joseph Thill, Vikas Madhusudan Nadkarni