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Expired Canadian patentCanada

Cloning and utilization of aminotransferase genes

CA 1295568 C · Owner: Primrose, Sandy Blackadder · Inventors: Primrose, Sandy Blackadder; Edwards, Richard Mark

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Abstract From the Canadian patent

A composition of matter comprising plasmids containing genes coding for the synthesis of aminotransferases was constructed. These plasmids are used in a method for synthesizing increased concentrations of aminotransferase enzymes and for the improved synthesis of amino acids in cells having the transamination reaction rate-limiting.

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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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.
FiledJanuary 19, 1984
GrantedFebruary 11, 1992
Term endedFebruary 11, 2009
Patent numberCA 1295568 C
Classification (IPC)C12N15/03 +2 more

Timeline

Timeline From CIPO dates

198519881991199419972000200320062009Application filedJan 19, 1984Patent grantedFeb 11, 1992Term endedFeb 11, 2009

Sources & verification

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