Patents by Inventor Rainer von Fragstein

Rainer von Fragstein 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).

  • Flexible water and oil resistant composites
    Patent number: 6261678
    Abstract: This invention provides air impermeable liquid-water resistant water-vapor-permeable composites that are highly oleophobic and some of which have enhanced water-vapor-permeable properties. In its broadest aspect, the composites comprise: a layer of a microporous polymer that is water-vapor permeable and which is oleophobic, and which is liquid water-resistant. This layer is in contact with an air-impermeable, liquid water resistant, polymer layer that is permeable to water-vapor molecules. The oleophobic microporous polymer layer confers enhanced oleophobicity. In another aspect, a third layer of a microporous, water vapor permeable polymer can also be present on the other side of the air-impermeable polymer layer.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: July 17, 2001
    Inventors: Rainer von Fragstein, Wolfgang Buerger, Rudolf Steffl, Wolfgang Zehnder
  • Flexible water and oil resistant composites
    Patent number: 6074738
    Abstract: This invention provides air impermeable liquid-water resistant water-vapor-permeable composites that are highly oleophobic and some of which have enhanced water-vapor-permeable properties.In its broadest aspect, the composites comprise: a layer of a microporous polymer that is water-vapor permeable and which is oleophobic, and which is liquid water-resistant. This layer is in contact with an air-impermeable, liquid water resistant, polymer layer that is permeable to water-vapor molecules. The oleophobic microporous polymer layer confers enhanced oleophobicity. In another aspect, a third layer of a microporous, water vapor permeable polymer can also be present on the other side of the air-impermeable polymer layer.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: June 13, 2000
    Inventors: Rainer von Fragstein, Wolfgang Buerger, Rudolf Steffl, Wolfgang Zehnder