×

Test strip for measuring analyte concentration over a broad range of sample volume

  • US 6,395,227 B1
  • Filed: 05/16/1995
  • Issued: 05/28/2002
  • Est. Priority Date: 08/28/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A test strip, for determining the concentration of an analyte in a body fluid, which comprises:

  • a cover sheet, having an elongated window cut through it;

    a lamellar membrane adjacent to the cover sheet, extending across and into the window and containing a reagent that reacts with the analyte to produce a color change;

    a porous sheet in fluid communication with the membrane, having a porous, enlarged pillow portion and a compressed portion, the pillow portion being substantially aligned with the window; and

    a backing sheet, adjoining the porous sheet and having a sample port cut through it;

    whereby fluid introduced into the sample port can flow through the porous sheet to the membrane, and analyte in the fluid can react with the reagent to produce a color change visible through the window.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×