High strength friction stir welding
CA 2863628 C · Owner: The Boeing Company · Inventors: Litwinski, Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for friction stir welding for forming a friction stir welding joint includes a friction stir welding tool in rotatable communication with a rotatable spindle. The friction stir welding tool defines a cavity. At least one heater is at least partially received in the cavity and thermally communicates with the friction stir welding tool to thereby heat the tool and inhibit grain growth in the wedling joint.
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 November 5, 2002 and granted July 24, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2024.
- 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.