Patents by Inventor Ina Pahl

Ina Pahl 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).

  • Cross-flow filter cassette
    Patent number: 7520988
    Abstract: An improved cross-flow filtration unit utilizing at least one two-ply membrane is disclosed that has a particular pore size relationship in the two membrane layers.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: April 21, 2009
    Assignee: Sartorius Stedim Biotech GmbH
    Inventors: Ina Pahl, Hans-Weddo Schmidt, Ulrich Grummert
  • Cross-flow filter cassette
    Publication number: 20070062856
    Abstract: An improved cross-flow filtration unit utilizing at least one two-ply membrane is disclosed that has a particular pore size relationship in the two membrane layers.
    Type: Application
    Filed: November 20, 2006
    Publication date: March 22, 2007
    Inventors: Ina Pahl, Hans-Weddo Schmidt, Ulrich Grummert
  • Method for carrying out an integrity test for filter elements
    Patent number: 6983504
    Abstract: A method for testing the integrity of filter elements, in which the convective component of the volumetric gas flow rate is determined from the ratio of the volumetric gas flow rates and the ratio of the solubility or diffusion coefficients of two different gases in the wetting liquid of the filter elements or is determined from the ratio of the volumetric gas flow rates and the ratio of the solubility or diffusion coefficients of a test gas in two different wetting liquids.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: January 10, 2006
    Assignee: Sartorius AG
    Inventors: Ulrich Grummert, Ina Pahl
  • Wide passage cross-flow filter cassettes
    Patent number: 6916420
    Abstract: An improved wide passage cross-flow filtration cassette is disclosed that incorporates an open mesh matrix retentate spacer that is dimensioned and oriented so as to improve flux and cause turbulence in the flow of fluids through the cassette.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: July 12, 2005
    Assignee: Sartorius AG
    Inventors: Hans-Weddo Schmidt, Ulrich Grummert, Ina Pahl, Claudia Hartmann
  • Cross-flow filtration unit
    Publication number: 20050126980
    Abstract: An improved cross-flow filtration unit utilizing at least one two-ply membrane is disclosed that has a particular pore size relationship in the two membrane layers.
    Type: Application
    Filed: December 21, 2000
    Publication date: June 16, 2005
    Inventors: Ina Pahl, Hans-Weddo Schmidt, Ulrich Grummert
  • Method for carrying out an integrity test for filter elements
    Publication number: 20040129060
    Abstract: A method for testing the integrity of filter elements, in which the convective component of the volumetric gas flow rate is determined from the ratio of the volumetric gas flow rates and the ratio of the solubility or diffusion coefficients of two different gases in the wetting liquid of the filter elements or is determined from the ratio of the volumetric gas flow rates and the ratio of the solubility or diffusion coefficients of a test gas in two different wetting liquids.
    Type: Application
    Filed: October 2, 2003
    Publication date: July 8, 2004
    Applicant: Sartorius AG
    Inventors: Ulrich Grummert, Ina Pahl
  • Cross-flow filter cassettes in the form of improved wide-slit modules
    Publication number: 20030173285
    Abstract: An improved wide passage cross-flow filtration cassette is disclosed that incorporates an open mesh matrix retentate spacer that is dimensioned and oriented so as to improve flux and cause turbulence in the flow of fluids through the cassette.
    Type: Application
    Filed: October 28, 2002
    Publication date: September 18, 2003
    Inventors: Hans-Weddo Schmidt, Ulrich Grummert, Ina Pahl, Claudia Hartmann