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Expired Canadian patentCanada

Method of isolating and purifying nucleic acids from biological samples

CA 1313359 C · Owner: Molecular Biosystems, Inc. · Inventors: Shrawder, Elsie J.; Seligson, David B.

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Abstract From the Canadian patent

A method for isolating and purifying nucleic acids from a biological sample is described. The method employs anion exchange materials, preferably the chloride form of such materials, to bind the nucleic acids and uses halide salts of increasing molarity, preferably chloride salts, to adsorb, wash and elute the nucleic acids. - 35 -

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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 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 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.
FiledNovember 30, 1987
GrantedFebruary 2, 1993
Term endedFebruary 2, 2010
Patent numberCA 1313359 C
Classification (IPC)C07H21/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 30, 1987Patent grantedFeb 2, 1993Term endedFeb 2, 2010

Sources & verification

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