Patents by Inventor Walter E. Bradley

Walter E. Bradley 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).

  • Ventilated thermoplastic polymer foam filter rods
    Patent number: 4411280
    Abstract: Ventilated thermoplastic polymer foam filter rods and the processes for their preparation. The ventilated thermoplastic polymer foam filter rods are characterized by the presence of at least some cells which are bridged by fibrils, the rod being surrounded by a high density skin structure having a discontinuity such as to produce a ventilation of at least 50%. Discontinuity in the skin structure may be produced by skin solvent etching, skin abraiding, skin perforating and skin cutting.
    Type: Grant
    Filed: September 11, 1981
    Date of Patent: October 25, 1983
    Assignee: Celanese Corporation
    Inventors: Terry S. Floyd, Donna G. Rhoden, Walter E. Bradley