Patents by Inventor Paul D. Bettencourt

Paul D. Bettencourt 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).

  • Means for controlling feedstock compaction in forming flexible porous pipes of controlled pore size
    Patent number: 5366365
    Abstract: A process for making porous flexible pipes from two feed streams containing a thermoplastic material and a thermoset material, in which the feed streams are delivered to a die head extruder in a substantially compaction-free and segregation-free manner to insure that the feed composition in the extruder is substantially the same as the initial feed composition. The process can be automated so that an operator can manufacture porous flexible pipes of desired porosity and other rheological and mechanical characteristics by simply entering a command which will simultaneously adjust the process parameters such as the temperature and/or pressure inside the extruder, and the post-extrusion tension to meet the special need.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: November 22, 1994
    Inventors: Henry W. Sullivan,, Charles R. Killian, Paul D. Bettencourt