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Expired Canadian patentCanada

5'-phosphodiesterase enzyme preparation and method for its production

CA 1313636 C · Owner: Bowles, Linda K. · Inventors: Bowles, Linda K.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

This invention relates to a 5'-phosphodiesterase enzyme preparation which exhibits excellent storage stability. It is obtained by a special extraction process from rapidly proliferating parts of germinating seeds. The enzyme is useful for the hydrolysis of RNA to form 5'-nucleotides.

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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 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
  • 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 15, 1989
GrantedFebruary 16, 1993
Term endedFebruary 16, 2010
Patent numberCA 1313636 C
Classification (IPC)C12N9/16 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMarch 15, 1989Patent grantedFeb 16, 1993Term endedFeb 16, 2010

Sources & verification

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