Method for selective surface protection of a gas turbine blade which has previously been in service
CA 2442460 C · Owner: Ge Aviation Service Operation Llp · Inventors: Chen, Keng Nam; Langley, Nigel Brian Thomas; Yow, Kwok Heng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas turbine blade (20) which has previously been in service is protected by cleaning the gas turbine blade (20) and then first depositing a platinum first layer on the airfoil (22) and the platform (28) of the gas turbine blade (20). Thereafter a platinum second layer is deposited over the platform (28) but not the airfoil (22). A platinum- aluminide protective coating is formed by depositing an aluminum-containing layer (80) overlying both the platform (28) and the airfoil (22) and interdiffusing the platinum and the aluminum.
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 September 25, 2003 and granted January 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2025.
- 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.