Recursive query for communications network data
CA 2441344 A1 · Owner: Worldcom, Inc. · Inventors: Gallant, John K.; Mcmurry, Kathleen A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An approach for providing telephony and other services over a data network is disclosed. A communications system (100) includes a location server (115) that generates a first subset from the set of all addresses relating to a called party (118). A proxy server (113) obtains a first subset of addresses from the location server (115) and attempts to establish a session with the called party (118) based on the subset of addresses. In response to whether the first subset of addresses results in session establishment the proxy server (113) , may then request a second subset from the location server (115). Context information provided by the location server (115) with the first subset may …
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 March 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2024.
- 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.