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Expired Canadian patentCanada

Method and wireless system for terminating a dormant mode in a packet data session

CA 2397259 C · Owner: Abrol, Nischal · Inventors: Abrol, Nischal

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 method and system for terminating dormant mode wireless packet data sessions when a remote network node becomes inaccessible. A wireless subscriber station detects that the remote network node become inaccessible and sends the wireless network a termination notification identifying the packet data session corresponding to the remote network node.

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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 January 9, 2001 and granted November 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 9, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 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.
FiledJanuary 9, 2001
GrantedNovember 15, 2011
Term endedJanuary 9, 2021
Patent numberCA 2397259 C
Classification (IPC)H04W28/18 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedJan 9, 2001Patent grantedNov 15, 2011Term endedJan 9, 2021

Sources & verification

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