Extra-low-voltage heating system
CA 2179677 C · Owner: Wildi, Theodore · Inventors: Wildi, Theodore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extra-low-voltage heating system that produces a reduced magnetic field and which uses three insulated copper wires or equivalents, as, heating elements. Its low operating temperature robustness and safety, enable the system to be installed for example, in floors and walls for the general heating of buildings, and in outdoor pavements for snow-melting, purposes, etc. The single-phase feeder busbars are configured to reduce the magnetic field around the feeder. A monitoring network continually checks the integrity of the heating system.
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 June 21, 1996 and granted July 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2018.
- 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.