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Expired Canadian patentCanada

Chromatographic supports for separation of oligonucleotides

CA 1318654 C · Owner: Atkinson, Anthony · Inventors: Scawen, Michael D.; Edwardson, Peter A. D.; Cox, Geoffrey B.

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

A chromatographic packing useful for the separation of oligonucleotides is disclosed. The packing includes an insert porous support particle and silane bonded phase comprising a weak anion exchange group in close proximity to at least one polar non-ionic group.

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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 June 1, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 1, 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.
FiledJanuary 20, 1988
GrantedJune 1, 1993
Term endedJune 1, 2010
Patent numberCA 1318654 C
Classification (IPC)B01J20/32 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJan 20, 1988Patent grantedJune 1, 1993Term endedJune 1, 2010

Sources & verification

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