Patents by Inventor Franz Zavier Mahl, deceased

Franz Zavier Mahl, deceased 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).

  • Screening element
    Patent number: 7303079
    Abstract: The invention provides a screen which has a screen body (12) and a plurality of ribs which extend across the screen body. Screening apertures (118) are defined in the screen body by the ribs. A reinforcing frame (124) is embedded in the screen body, which frame is made of a first plastics material which has a greater density than a second plastics material from which the screen body (12) is made. The frame has keying formations formed therein to assist in bonding between the frame and the screen body.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: December 4, 2007
    Assignee: RCM Plastics CC
    Inventors: Johan Theodore Reid-Robertson, Angelo Marietta, Anneke Denise Le Roux, legal representative, Charles Wynand Louw, Franz Zavier Mahl, deceased