Automatic disconnect in ringing state of call from user with no credit
CA 2527653 C · Owner: Kahn, Ari · Inventors: Kahn, Ari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and system for operating a telephony service are disclosed. A telephone network is provided, which may be a physical network or a virtual network hosted by an existing network. Network identities defined by SIM cards, or telephones with built-in SIM cards are issued to network users. The , SIM cards defines a network identity including a unique network telephone number. The network, which is preferably an intelligent network (IN) is configured to permit telephones of the users to receive calls and/or messages irrespective of the status of a user's account with the network. In addition the network is configured to permit users without credit or airtime to make an outgoing call …
Read the whole patent
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 May 26, 2004 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 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.
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.