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Expired Canadian patentCanada

Network protocols for distributing functions within a network

CA 2433261 C · Owner: Nortel Networks Limited · Inventors: Stewart, Daniel B.; Botte, James 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

A network protocol distributes control and lookup functions among various network elements. Plural servers are permitted to service the same domain name without required remapping. Each client or server is permitted to have a different network quality of service level that is provided by one or more network elements of a network or server quality of service level that is provided by a server.

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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 20, 2001 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2023.
  • 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 20, 2001
GrantedFebruary 1, 2011
Term endedDecember 20, 2021
Patent numberCA 2433261 C
Classification (IPC)H04L61/45 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedDec 20, 2001Patent grantedFeb 1, 2011Term endedDec 20, 2021

Sources & verification

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