Gas turbine blade
CA 2231035 C · Owner: Suenaga, Kiyoshi · Inventors: Tomita, Yasuoki; Fukuno, Hiroki; Suenaga, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a gas turbine blade in which the tip end thereof is cooled effectively to decrease the metal temperature for the prevention of burning and the temperature gradient of blade metal is decreased to prevent the occurrence of a crack. In the gas turbine blade provided with a cooling passage therein, a protrusion is provided on the inside from the extension of blade profile on the outer surface of blade 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 March 3, 1998 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.