Patents by Inventor Preben Merrild Elkjær

Preben Merrild Elkjær 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).

  • Disposable cartridge for characterizing particles suspended in a liquid
    Patent number: 7797990
    Abstract: A particle characterization apparatus in which particles suspended in a liquid pass through an orifice or aperture for detection and characterization of the particles utilizing impedance determination. In particular, the apparatus includes a membrane of a polymer as a base material for precision machining of a sub-millimeter orifice. Forming the orifice in a polymer membrane facilitates the construction of a single use cartridge for haematology analysis due to low material and production costs.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: September 21, 2010
    Assignee: Chempaq A/S
    Inventors: Ulrik Darling Larsen, Preben Merrild Elkjær