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Expired Canadian patentCanada

Method and system for priority based telephone call screening

CA 2462470 C · Owner: Comcast Cable Holdings, Llc · Inventors: Stevens, John Clarke

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

Method and system for managing incoming telephone calls in which each incoming call is associated with a telephone number. A time constraint a telephone use status, and a treatment option to associate with a priority code of a selected telephone number are selected. The priority code is assigned to each selected number based on the selected time constraint telephone use status, and treatment option. If a number associated with an incoming call is a selected number the priority code assigned to the selected number associated with the incoming call is determined based on the period of time at which the telephone receives the incoming call and based on the telephone' use status during the time …

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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 March 30, 2004 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 30, 2004
GrantedJuly 23, 2013
Term endedMarch 30, 2024
Patent numberCA 2462470 C
Classification (IPC)H04M3/42 +2 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMarch 30, 2004Patent grantedJuly 23, 2013Term endedMarch 30, 2024

Sources & verification

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