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Expired Canadian patentCanada

Expression systems for over production of desired proteins

CA 1297050 C · Owner: Biogen, Inc. · Inventors: Allet, Bernard; Kawashima, Eric H.

CIPO record

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

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Abstract From the Canadian patent

Recombinant DNA molecules comprising DNA sequences derived from bactariophage T4 that are useful in expressing desired polypeptides in unexpectedly high yields, hosts and expression systems comprising such recombinant DNA molecules and methods for expressing desired polypeptides in high yields by the utilization of such hosts and expression systems.

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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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 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.
FiledOctober 9, 1986
GrantedMarch 10, 1992
Term endedMarch 10, 2009
Patent numberCA 1297050 C
Classification (IPC)C12N15/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedOct 9, 1986Patent grantedMarch 10, 1992Term endedMarch 10, 2009

Sources & verification

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