Patents by Inventor Harvey A. Howells

Harvey A. Howells 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: 6054178
    Abstract: A method of manufacturing a fabric mesh reinforced monolithic thermoplastic membrane. The open mesh fabric is drawn into the gap between two calender rollers of a membrane extruder, a molten first thermoplastic material is extruded into the throat of the gap between the first roller and the first side of the fabric mesh, while a second molten thermoplastic material is simultaneously extruded into the throat of the gap between the second roller and the second side of the fabric mesh. The composite material is then drawn through the gap between the first and second rollers to force the molten first and second thermoplastic materials into and through the open mesh of the fabric to fuse and bond the molten first and second thermoplastic materials in and about the fabric mesh to form the fabric mesh reinforced monolithic thermoplastic membrane.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: April 25, 2000
    Assignee: Serrot International, Inc.
    Inventor: Harvey A. Howells