Powerline monitoring device
CA 2033410 A1 · Owner: Kerber, Thomas B. · Inventors: Kerber, Thomas B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A powerline monitoring device has a single core that can be used to continuously measure current as well as other parameters such as temperature ambient temperature, phase angle and voltage. The current is measured through the same set of windings that power the device. The device can be mounted on or removed from a powerline while the powerline is activated. Measurements taken by the device are transferred to a receiving station. The device operates from power on the powerline itself and is designed to continue to operate for approximately ten seconds subsequent to complete failure of power in the powerline. The device can operate over a broad range of current in the powerline ranging from …
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 28, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2012.
- 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.