Universal thermostat on indicator
CA 2340317 A1 · Owner: Stacey, Robert A. · Inventors: Stacey, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a method and apparatus to provide a clear visual indication of the, operational status of a current carrying circuit and more specifically that of a remote air, heating or cooling system when installed in conjunction with a low voltage thermostat. The apparatus is a low cost device universally adaptable to new or existing mechanical and, electronic thermostats. The apparatus will operate over a wide range of current loads and, does not require external power. The apparatus provides a method of determining the point, at which a thermostat will switch and in a multi-thermostat system provides a , method of, determining which thermostats are active.
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 14, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2023.
- 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.