Turbofan case and method of making
CA 2776404 C · Owner: Pratt & Whitney Canada Corp. · Inventors: Liu, Quantal; Weinberg, Maurice; Eleftheriou, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A casing for a gas turbine includes a fan case an intermediate case and a gas generator case integrated with one another. In another aspect the casing provides a construction including several aspects which improve structural efficiency such as a semi-monocoque construction, improved strut design etc. Improved load paths and means for transmitting loads in the engine case are also disclosed.
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 July 19, 2004 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 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.
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.