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Expired Canadian patentCanada

Recombinant dna product and methods

CA 1340879 C · Owner: Winter, Gregory Paul · Inventors: Winter, Gregory Paul

CIPO record

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Abstract From the Canadian patent

An altered antibody is produced by replacing the complementarity determining regions (CDRs) of a variable region of an immunoglobulin (Ig) with the CDRs from an Ig of different specificity using, recombinant DNA techniques. The gene coding sequences for producing the altered antibody may be produced by site-directed mutagenesis using long oligonucleotides.

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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 January 25, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 25, 2017.
  • 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 26, 1987
GrantedJanuary 25, 2000
Term endedJanuary 25, 2017
Patent numberCA 1340879 C
Classification (IPC)C12N15/13 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006200920122015Application filedMarch 26, 1987Patent grantedJan 25, 2000Term endedJan 25, 2017

Sources & verification

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