A termination circuit
CA 2275986 A1 · Owner: United Energy Ltd. · Inventors: Stone, Geoffrey Ormiston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A termination circuit for N power distribution lines having resistance rij , connected between points Pi on N-1 of the lines and between the points Pi and a ground, which is connected to the remaining one of the lines. A circuit for use in delivering a communication signal on a power distribution system which distributes power signals, the communication signal having a high frequency relative to a frequency of the power signals the circuit including a , transformer which has windings for each line of the distribution system and , has substantially no net flux for the power signals and has a net flux for , the communication signal.
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 December 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2019.
- 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.