Anvil for friction stir welding high temperature materials
CA 2449972 C · Owner: Packer, Scott M. · Inventors: Sorensen, Carl D.; Packer, Scott M.; Nelson, Tracy W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A friction stir welding anvil (14) and method of producing a friction stir welding anvil (14) that precludes diffusion or mechanical bonding of the anvil (14) to the work pieces (10A, 10B) are provided. The alternatives for producing such an anvil (14) comprise coating the anvil (14) with diffusion barriers such as oxides, nitrides, intermetallics and/or refractory metals; , manufacturing an anvil (14) either completely or partially from the same; or placing a coating (26) of such materials in the form of a thin sheet or a powder between the anvil (14) and the work pieces (10A 10B). The anvil (14) , disclosed herein exhibits high strength and hardness even at elevated temperatures, …
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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 12, 2002 and granted February 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 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.