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Expired Canadian patentCanada

Method and means for microbial polypeptide expression

CA 1215921 A · Owner: Riggs, Arthur D. · Inventors: Riggs, Arthur D.; Itakura, Keiichi

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Abstract From the Canadian patent

Abstract of the Disclosure, The specification discloses recombinant microbial cloning vehicles comprising heterologous DNA coding for the expression of mammalian hormone (e.g. somatostatin) and other polypeptides, including plasmids suited for the transformation of bacterial hosts. The latter incorporate a regulon homologous to the host in its untransformed state, in reading phase with the structural gene for the heterologous DNA.

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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 December 30, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 2003.
  • 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 6, 1978
GrantedDecember 30, 1986
Term endedDecember 30, 2003
Patent numberCA 1215921 A
Classification (IPC)C12N15/00 +2 more

Timeline

Timeline From CIPO dates

197919821985198819911994199720002003Application filedNov 6, 1978Patent grantedDec 30, 1986Term endedDec 30, 2003

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