Pool sentinel
CA 2221611 A1 · Owner: Paller, Michael Scott · Inventors: Paller, Michael Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a passive means to provide full time monitoring of unattended , swimming pools, where the unit activates remotely and is self contained resting on the surface of the, water. Signals received from the motion of wave action which cause the cone to tilt and contacts to, close, or sounds received from the hydrophone as a result of agitation in the water result in the, circuit activating the power supply pulling in a timer relay contactor which subsequently supplies, power to a transmitter. This application of power activates the transmitter which then transmits, information to an in-house receiver which converts the signal into a command for operation of, …
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 January 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 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.