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Expired Canadian patentCanada

Geographic redundancy protection method and apparatus for a communications network

CA 2246818 C · Owner: Lucent Technologies Inc. · Inventors: Gourley, David G.; Brodfuhrer, Russell E.; Pearcey, Simon Mark

CIPO record

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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 method and apparatus for providing back-up management of a network element in a multi-tiered network management system. Network elements have a primary element manager responsible for managing communications with that network element and a secondary element manager that can be at a geographically remote location responsible for assuming control of communications with the network element should the primary element manager become unable to do so.

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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 September 4, 1998 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 4, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 4, 1998
GrantedJuly 29, 2003
Term endedSeptember 4, 2018
Patent numberCA 2246818 C
Classification (IPC)H04L41/04 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedSep 4, 1998Patent grantedJuly 29, 2003Term endedSep 4, 2018

Sources & verification

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