Patents by Inventor Edwin Zalewski

Edwin Zalewski 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).

  • Textile composite, production thereof and use thereof
    Patent number: 5612114
    Abstract: Described is a composite comprising at least one textile sheet material composed of synthetic polymer fibers and at least one textile sheet material composed of inorganic fibers, which textile sheet materials are joined to one another by yarns.The textile sheet materials are preferably joined together by sewing, knitting or stitch-bonding.The composite is especially useful as reinforcement for the production of roofing felts.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: March 18, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Edwin Zalewski, Karl-Christian Zerfass
  • Liquid filtration process
    Patent number: 4289627
    Abstract: A three dimensional filter element of a porous fabric of synthetic fibers wherein the individual threads are bound to each other as to be unshiftable, said fabric having an air permeability of more than 50 l/dm.sup.2 . min at a pressure difference of 2 millibar and resisting to a permanent load over the entire filter area without the formation of free regions and a method for the separation of solid material from a liquid phase by means of the three-dimensional filter element preferably by gravity.
    Type: Grant
    Filed: August 30, 1979
    Date of Patent: September 15, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Disselbeck, Gerhard Neumann, Karl-Heinz Ott, Gunther Strobel, Edwin Zalewski