Connection release in a telecommunications system
CA 2189772 C · Owner: British Telecommunications Public Limited Company · Inventors: Chotai, Sunil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a telephone network, e.g. a cellular radio system after a transaction , (e.g. a call) has ended the connection is not fully released. If another connection is to, be setup on ending of a current call e.g. a voice message or call completion to, be a subscriber arrangement, a flag F is set in the connection management system, CM. The status of the flag F is used to determine if the signal in connection towards a termination B should be kept or released immediately. Depending on the stems of flag F different actions are taken in the network. The connection may Ix maintained for a predetermined interval. Data F F1, F2, concerning, the slams of the flags are transmitted from switching …
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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 May 26, 1995 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2017.
- 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.