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Expired Canadian patentCanada

Nuclear antigen la

CA 1313818 C · Owner: Sturgess, Allan David · Inventors: Coppel, Ross Leon; Sturgess, Allan David

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 diagnostic test for detection of antinuclear antibody anti-La in a serum sample comprises contacting the serum sample with a support having immobilised thereon a synthetic polypeptide displaying the antigenicity of all or a portion of the human autoantigen La, or an antigenically active fragment thereof, and detecting the presence of anti-La antibody bound to the synthetic polypeptide or fragment.

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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 February 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 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.
FiledJune 2, 1988
GrantedFebruary 23, 1993
Term endedFebruary 23, 2010
Patent numberCA 1313818 C
Classification (IPC)G01N33/53 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 2, 1988Patent grantedFeb 23, 1993Term endedFeb 23, 2010

Sources & verification

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