Patents by Inventor Stefan Fischer-Fruehholz

Stefan Fischer-Fruehholz 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).

  • Filter module and filter unit
    Patent number: 10226742
    Abstract: Filter module and filter unit with an inlet for medium that is to be filtered, and with an outlet for the permeate, with at least one filter sheet, a first spacer adjacent to the media side and a second spacer adjacent to the permeate side, the spacers being designed with a draining action, and the first spacer being connected to an inlet and the second spacer to an outlet, wherein the at least one filter sheet forms a first filter unit together with the two adjacent spacers, the filter sheet is designed as a single filter or a filter stack, the first spacer is designed to be impermeable to liquid on its outer face directed away from the filter sheet and is sealed off at its boundary to the outlet end, and the second spacer is designed to be impermeable to liquid on its outer face directed away from the filter sheet and is sealed off at its boundary to the inlet end.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: March 12, 2019
    Assignee: Sartorius Stedim Biotech GmbH
    Inventors: Stefan Fischer-Frühholz, André Pastor
  • Filter module and filter unit
    Publication number: 20090266756
    Abstract: Filter module and filter unit with an inlet for medium that is to be filtered, and with an outlet for the permeate, with at least one filter sheet, a first spacer adjacent to the media side and a second spacer adjacent to the permeate side, the spacers being designed with a draining action, and the first spacer being connected to an inlet and the second spacer to an outlet, wherein the at least one filter sheet forms a first filter unit together with the two adjacent spacers, the filter sheet is designed as a single filter or a filter stack, the first spacer is designed to be impermeable to liquid on its outer face directed away from the filter sheet and is sealed off at its boundary to the outlet end, and the second spacer is designed to be impermeable to liquid on its outer face directed away from the filter sheet and is sealed off at its boundary to the inlet end.
    Type: Application
    Filed: April 2, 2009
    Publication date: October 29, 2009
    Applicant: Sartorius Stedim Biotech GmbH
    Inventors: Stefan Fischer-Fruehholz, Andre Pastor
  • Adsorption membranes, method of producing same and equipment, including the adsorption membranes
    Patent number: 7311832
    Abstract: The present invention relates to adsorption membranes comprising microporous polymer membranes in which adsorbent particles are incorporated. Furthermore, the present invention relates to a method of producing the inventive adsorption membranes as well as devices which comprise the inventive adsorption membranes.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: December 25, 2007
    Assignee: Sartorius Stedim Biotech GmbH
    Inventors: Wolfgang Demmer, Stefan Fischer-Fruehholz, Andreas Kocourek, Dietmar Nussbaumer, Eberhard Wuenn
  • Adsorption membranes, method of producing same and equipment, including the adsorption membranes
    Patent number: 7223342
    Abstract: The present invention relates to adsorption membranes, comprising microporous polymer membranes into which are incorporated porous silicon dioxide particles modified with hydrocarbon ligands having 2 to 24 carbon atoms as adsorbent particles. Furthermore, the present invention relates to a method of producing the inventive adsorption membranes as well as devices which comprise the inventive adsorption membranes.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: May 29, 2007
    Assignee: Sartorius AG
    Inventors: Wolfgang Demmer, Stefan Fischer-Fruehholz, Andreas Kocourek, Dietmar Nusbaumer, Eberhard Wuenn
  • Adsorption membranes, method of producing same and equipment, including the adsorption membranes
    Publication number: 20050121385
    Abstract: The present invention relates to adsorption membranes, comprising microporous polymer membranes into which are incorporated porous silicon dioxide particles modified with hydrocarbon ligands having 2 to 24 carbon atoms as adsorbent particles. Furthermore, the present invention relates to a method of producing the inventive adsorption membranes as well as devices which comprise the inventive adsorption membranes.
    Type: Application
    Filed: September 27, 2004
    Publication date: June 9, 2005
    Inventors: Wolfgang Demmer, Stefan Fischer-Fruehholz, Andreas Kocourek, Dietmar Nusbaumer, Eberhard Wuenn
  • Adsorption membranes, method of producing same and equipment, including the adsorption membranes
    Publication number: 20050115890
    Abstract: The present invention relates to adsorption membranes comprising microporous polymer membranes in which adsorbent particles are incorporated. Furthermore, the present invention relates to a method of producing the inventive adsorption membranes as well as devices which comprise the inventive adsorption membranes.
    Type: Application
    Filed: September 27, 2004
    Publication date: June 2, 2005
    Inventors: Wolfgang Demmer, Stefan Fischer-Fruehholz, Andreas Kocourek, Dietmar Nussbaumer, Eberhard Wuenn