Patents by Inventor Chris Dewaele

Chris Dewaele 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).

  • GRADED EXTERNAL PREFILTER ELEMENT FOR CONTINUOUS-FLOW SYSTEMS
    Publication number: 20080029449
    Abstract: A prefilter element for continuous flow systems as illustrated by a high-performance liquid chromatography cartridge or column is constructed with a gradient filter that has a gradient in average pore size over its thickness, the pore size decreasing in the direction of flow. This prefilter element is retained in a housing separate from any functional components of the continuous-flow system other than the prefilter element itself, the prefilter element being separable from the other functional components to allow the prefilter to be replaced without disturbing any other functional components.
    Type: Application
    Filed: July 19, 2007
    Publication date: February 7, 2008
    Applicant: BIO-RAD LABORATORIES, INC.
    Inventors: Chris Dewaele, Pascal Wijnant, Hilde Surgeloose
  • Reduction in back pressure buildup in chromatography by use of graded filter media
    Patent number: 5985140
    Abstract: Cartridges for high performance liquid chromatography are designed for use with a large number of repeated injections without excessive buildup of back pressure by the inclusion of a filter medium consisting of sintered stainless steel fibers formed into a non-woven structure whose pore size decreases in the direction of flow down to a pore size of less than ten microns.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: November 16, 1999
    Assignee: Bio-Rad Laboratories, Inc.
    Inventor: Chris Dewaele