Patents by Inventor Franciscus A. M. Schenkels

Franciscus A. M. Schenkels 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).

  • Fibers and yarns from a blend of aromatic polyamides
    Patent number: 4783367
    Abstract: Fibers made from a blend of poly-p-phenylene terephthalamide (PPDT) and a copolyamide derived from p-phenylene diamine, terephthalic acid and a naphthalenic difunctional monomer show improved properties, particularly tenacity, compared with PPDT fibers. The blend can be processed in the same manner as the PPDT polymer.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: November 8, 1988
    Assignee: Akzo N.V.
    Inventors: Hendrik Maatman, Bernardus M. Koenders, Franciscus A. M. Schenkels