Gas turbine blade
CA 2262701 C · Owner: Tomita, Yasuoki · Inventors: Aoki, Sunao; Tomita, Yasuoki; Matsuura, Masaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A conventional gas turbine blade using a steam cooling system in which high-, pressure steam is supplied to an inner portion of the blade to cool the blade therewith and recover thermal energy, has been proposed but has a problem to be solved concerning its strength. A gas turbine blade capable of solving this problem free from the strength problem and sufficiently resistant to a flow of the high-pressure steam, wherein a cooling medium flow passage extending in the lengthwise direction of the blade is formed in the interior thereof reinforcing ribs connecting front and rear walls of the blade together and extending in the direction of a flow of the cooling medium being provided in …
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 3, 1998 and granted February 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2020.
- 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.