Expired Canadian patentCanada
Vertical axis type wind power station
CA 2752116 C · Owner: Shinko Electric Co. Ltd. · Inventors: Matsunaga, Tomoyuki; Shiozaki, Akira; Kato, Kazumichi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vertical axis type wind power station which can stabilize the turning motions of blades and can raise the power generation efficiency by lightening the blades to smoothen the turning motions of the blades.
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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 7, 2004 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 7, 2004
GrantedAugust 6, 2013
Term endedJanuary 7, 2024
Patent numberCA 2752116 C
Classification (IPC)F03D3/06
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.