Patents by Inventor Johan L. Ebregt

Johan L. Ebregt 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: 4702876
    Abstract: Fibers are air-gap spun from a polymeric spinning mass comprising an aromatic polyamide (such as poly-p-phenyleneterephthalamide) by extrusion through a spinneret, passing through an air-gap, passage through a liquid (such as water), and exiting the liquid via an aperture which is variable in size. The use of such an aperture allows easier use of the equipment (especially the stringing up operation) and better fibre properties (such as tensile strength).
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: October 27, 1987
    Assignee: Akzo N.V.
    Inventors: Johan L. Ebregt, Hendrik Maatman