Patents Assigned to Portascience Inc.
  • Patent number: 6709868
    Abstract: A method for quantitatively measuring white blood cell count involves capture of white blood cells from a fluid sample by a retainer, removal of the red blood cells and other interfering substances by a wash solution, and reading the result of a color reaction in which an ester which is present on the white blood cells cleaves a chromogenic substrate which produces a water insoluble dye. The apparatus for use in the present method includes a retainer for white blood cells that has a dye substrate immobilized therein and an absorption layer that wicks and takes up all excess washing solution flowing past the sample.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: March 23, 2004
    Assignee: Portascience Inc.
    Inventors: Wai Tak Law, Yuri Nikolyukin, Inna Nikolyukin