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Expired Canadian patentCanada

Bi-directional lateral chromatographic test device

CA 1317876 C · Owner: Disease Detection International Inc. · Inventors: Whiteside, Julie; Horstman, Frederick C.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A chromatic test device for the performance of immuno- or chemical assays wherein a unitary planar fibrous filter body incorporates a sample application zone a, separation zone and a reaction zone and said application zone is in fluid communication with first absorbent means and said reaction zone is in fluid communication with second absorbent means to establish bilateral flow of the fluid component of said sample and of analyte applied to said zones during the performance of an assay.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted May 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 7, 1988
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317876 C
Classification (IPC)G01N33/54 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedDec 7, 1988Patent grantedMay 18, 1993Term endedMay 18, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.