Patents by Inventor Mark A. J. Pentecost

Mark A. J. Pentecost 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).

  • Shaped part of injected or extruded plastic waste
    Patent number: 5217800
    Abstract: A shaped part comprises a body of plastic material, more than 50% of the volume of the shaped part consisting of plastic waste particles and particles of impurity distributed therethrough and embedded therein. The plastic waste particles have a flow point or more than 80.degree. C. and a length of less than 6 mm, up to 70% of the volume of the shaped part comprising plastic waste particles having a flow point exceeding the maximum processing temperature of the plastic material of the body. A portion of the plastic waste particles have a wall thickness of more than 0.5 mm and the remaining portion thereof has a wall thickness of less than 0.5 mm. Particles of the plastic material, plastic waste and impurities are mixed, the plastic material particles are plasticized at a processing temperature of 150.degree. C. to 210.degree. C.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: June 8, 1993
    Assignee: Schaumstoffwerk Greiner Gesellschaft m.b.H.
    Inventor: Mark A. J. Pentecost