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Canadian application, no grantCanada

Evolving cellular dna uptake by recursive sequence recombination

CA 2247930 A1 · Owner: Maxygen, Inc. · Inventors: Stemmer, Willem P.C.

CIPO record

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Abstract From the Canadian patent

The invention provides a number of strategies for transferring and/or evolving gene(s) associated with cellular DNA uptake so that they confer or enhance DNAuptake capacity of a recipient cell. Evolution is achieved by recursive cycles of recombination and screening/selection. One such strategy entails evolving genes that confer competence in one species to confer either greater competence in that species, or comparable or greater competence in a second species. Another strategy entails evolving genes for use as components of a cloning vector to confer enhanced uptake of the vector. Other strategies entail evolving viral receptors, viruses and genes that mediate conjugal , transfer.

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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

  • Filed March 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 20, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2019.
  • 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 20, 1997
GrantedNo grant recorded
Term endedMarch 20, 2017
Patent numberCA 2247930 A1
Classification (IPC)C12N15/63 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedMarch 20, 1997Term endedMarch 20, 2017

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