A delayed hydride cracking resistant seamless pressure tube made of zirconium (zr) alloy, and manufacturing method thereof
CA 2126997 C · Owner: Hong, Joon-Wha · Inventors: Hong, Joon-Wha; Kim, Dae-Whan; Kim, Seong-Su
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described a method for manufacturing a zirconium alloy seamless pressure tube having a texture with an improved fracture toughness and having a resistance against crack propagation due to delayed hydride cracking for use with a CANDU atomic reactor.
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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 29, 1994 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2016.
- 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.