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Expired Canadian patentCanada

The generation of recombinant eukaryotic cells with high-level expression

CA 1339207 C · Owner: Behringwerke Aktiengesellschaft · Inventors: Wirth, Manfred; Hauser, Hansjorg; Zettlmeibl, Gerd

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Abstract From the Canadian patent

1-, The generation of recombinant eukaryotic cells with high-level expression, A method in which a considerable increase in the expression of one or more non-selectable genes can be brought about by cotransfection of at least two selectable genes and subsequent selection is described. In subsequent steps to increase the expression further, it is possible for selection for each gene marker to be carried out individually.

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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 August 5, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 1, 1989
GrantedAugust 5, 1997
Term endedAugust 5, 2014
Patent numberCA 1339207 C
Classification (IPC)C12N15/85 +2 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedMarch 1, 1989Patent grantedAug 5, 1997Term endedAug 5, 2014

Sources & verification

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