Process for de-icing the rotor blades of a wind driven power station
CA 2228145 C · Owner: Wobben, Aloys · Inventors: Wobben, Aloys
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to de-ice a wind turbine rotor blade having inter-connected cavities s heat, transfer medium, pre-warmed if necessary is circulated through the cavities. A means for introducing a heat transfer medium into at least one cavity behind the, leading edge of the blade is installed in the root end of the rotor blade which is, connected to a rotor hub. There are flow channels which channel the heat transfer medium and connect neighbouring cavities in the end sections of the chambers at the rotor tip end.
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 August 5, 1996 and granted November 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 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.