Electrically heated window
CA 2194936 C · Owner: Castle, Derek Charles · Inventors: Chamberlain, Mark Andrew; Castle, Derek Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A window is provided which includes an array of fine closely spaced wires through, which electric current is passed to heat the window. Such windows are useful as vehicle windows, e.g. windscreens, because the heating disperses ice or condensation on the surface of the window, thereby improving visibility. According to the invention at least some of the, wires extend along diverging lines so that the heated area extends over substantially the whole of the transparent portion of the window. It is also described how to achieve a sufficiently uniform heating effect over the extended heated area. A method of manufacturing such windows, and an apparatus for forming such arrays of wires are also, …
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 13, 1997 and granted September 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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.