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Expired Canadian patentCanada

Self-sustained, sequence replication system

CA 2005589 C · Owner: Guatelli, John C. · Inventors: Guatelli, John C.; Gingeras, Thomas Raymond; Whitfield Kristina M.

CIPO record

Overview

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

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Abstract From the Canadian patent

The present disclosure provides details of an invention comprising an amplification system for the detection of target nucleic acids, most particularly target nucleic acid sequences, in an isothermal setting wherein all of the reagents necessary to conduct the amplification are present and the reactions are self-sustaining and continuous. Featured is a selective enzymatic digestion of a RNA/DNA duplex formed by, hybridization of a DNA primer with target nucleic acid thus freeing the DNA strand for further hybridization followed by primer extension to provide a DNA duplex that can serve as a template for production of a plurality of transcripts that can be recycled and/or detected as such …

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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 December 14, 1989 and granted February 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2009.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 14, 1989
GrantedFebruary 6, 2001
Term endedDecember 14, 2009
Patent numberCA 2005589 C
Classification (IPC)C12Q1/68 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedDec 14, 1989Patent grantedFeb 6, 2001Term endedDec 14, 2009

Sources & verification

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