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Expired Canadian patentCanada

Detection of proteins with colloidal gold

CA 1295217 C · Owner: Rohringer, Roland · Inventors: Holden, David W.; Rohringer, Roland

CIPO record

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Abstract From the Canadian patent

Roland Rohringer, David Holden ABSTRACT, A method to detect proteins immobilized on selected membranes in spot tests or on blots, prepared for example from polyacrylamide slab gels, is described. The stain, a suspension of collodial gold or other, selected metal which binds to the protein is polychromatic and yields an, indalible record.

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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 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 4, 2009.
  • 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 8, 1986
GrantedFebruary 4, 1992
Term endedFebruary 4, 2009
Patent numberCA 1295217 C
Classification (IPC)G01N33/68 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 8, 1986Patent grantedFeb 4, 1992Term endedFeb 4, 2009

Sources & verification

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