Termination number screening
CA 2401159 A1 · Owner: Springer, Arthur L. · Inventors: Springer, Arthur L.; Marchand, Dean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Terminating number screening to block portable billing products from terminating to a designated high fraud domestic or international terminating numbers. When a call is placed and it is billed to a portable billing product (104, 128), the dialed digits of the terminating number is verified against the terminating number screening database (108 118). If the sequence of , dialed digits is found in the terminating number screening database the call , is denied (112, 122). The caller is then informed that they cannot place a call to this destination and asked if there is another terminating number they wish to call (124). If the sequence of dialed digits is not found in the terminating …
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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 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2022.
- 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.