Expired Canadian patentCanada
Internally cooled turbine blade
CA 2827696 C · Owner: Pratt & Whitney Canada Corp. · Inventors: Papple, Michael
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 partial rib for use in a turbine blade is disclosed which provides one or more of improved strength air flow distribution and cooling. In one embodiment the rib has a height of between 0.3 and 0.9 of the airfoil height.
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 13, 2005 and granted February 16, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 2005
GrantedFebruary 16, 2016
Term endedJune 13, 2025
Patent numberCA 2827696 C
Classification (IPC)F01D5/18
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.