Connection time free data messaging through telephone networks
CA 2287431 A1 · Owner: Ultop Systems Ltd. · Inventors: Shalev, Shaul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for communicating between a caller (20) and a recipient (22) via telephone networks (14) including the following steps: the caller placing a call from a caller telephone line to a recipient telephone line (24) the , recipient receiving but not answering the call (26) and determining a message from the communication code (28). As a result a code is communicated between the caller and the recipient.
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 April 14, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2020.
- 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.