Patents by Inventor Stefan Koel

Stefan Koel 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).

  • Tubular membrane with a helical ridge, as well as a method and apparatus for producing such a tubular membrane
    Patent number: 11179679
    Abstract: A tubular membrane comprises a support tube made out of one or more flexible tapes of porous support material which have been helically wound into a tube shape with overlapping tape edges which have been sealed to each other, and a semi-permeable membrane layer made of membrane forming material on an inner wall of the support tube. At least one inwardly projecting helical ridge is provided on said inner wall of the support tube, which helical ridge is covered with or forms part of the membrane layer.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: November 23, 2021
    Assignee: X-Flow B.V.
    Inventors: Radek Oborny, Stefan Koel, Jens Potreck
  • Tubular Membrane With A Helical Ridge, As Well As A Method And Apparatus For Producing Such A Tubular Membrane
    Publication number: 20200054998
    Abstract: A tubular membrane comprises a support tube made out of one or more flexible tapes of porous support material which have been helically wound into a tube shape with overlapping tape edges which have been sealed to each other, and a semi-permeable membrane layer made of membrane forming material on an inner wall of the support tube. At least one inwardly projecting helical ridge is provided on said inner wall of the support tube, which helical ridge is covered with or forms part of the membrane layer.
    Type: Application
    Filed: September 3, 2019
    Publication date: February 20, 2020
    Inventors: Radek Oborny, Stefan Koel, Jens Potreck
  • Tubular membrane with a helical ridge, as well as a method and apparatus for producing such a tubular membrane
    Patent number: 10399038
    Abstract: A tubular membrane includes a support tube made out of one or more flexible tapes of porous support material which have been helically wound into a tube shape with overlapping tape edges which have been sealed to each other, and a semi-permeable membrane layer made of membrane forming material on an inner wall of the support tube. At least one inwardly projecting helical ridge is provided on the inner wall of the support tube, which helical ridge is covered with or forms part of the membrane layer.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: September 3, 2019
    Assignee: X-Flow B.V.
    Inventors: Radek Oborný, Stefan Koel, Jens Potreck
  • A TUBULAR MEMBRANE WITH A HELICAL RIDGE, AS WELL AS A METHOD AND APPARATUS FOR PRODUCING SUCH A TUBULAR MEMBRANE
    Publication number: 20160332120
    Abstract: A tubular membrane includes a support tube made out of one or more flexible tapes of porous support material which have been helically wound into a tube shape with overlapping tape edges which have been sealed to each other, and a semi-permeable membrane layer made of membrane forming material on an inner wall of the support tube. At least one inwardly projecting helical ridge is provided on the inner wall of the support tube, which helical ridge is covered with or forms part of the membrane layer.
    Type: Application
    Filed: January 12, 2015
    Publication date: November 17, 2016
    Inventors: Radek Oborný, Stefan Koel, Jens Potreck