Method and apparatus for internet-based telephone access to prepaid card and pin systems
CA 2405074 A1 · Owner: Liu, Yali · Inventors: Liu, Tong; Liu, Yali
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of providing a pre-paid telephone calling card services to a calling party initiating a voice-based connection to a called party telephone using an internet-based IP Phone process running on a personal computer. The method comprises initiating an A-leg connection between the IP Phone process and an Internet Gateway utilizing a computer network connecting the personal computer and the Internet Gateway (402), establishing a telephone connection between the internet gateway and a SCP (step 403). Once this connection is established, the SCP transmits a request to the calling party through the IP Phone process to provide account and call information (step 404). The calling …
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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, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 30, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.