Protective coating to reduce stress corrosion cracking of zircaloy fuel sheathing
CA 2286358 C · Owner: Chan, Paul Ka-Hang · Inventors: Chan, Paul Ka-Hang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective coating (10) to reduce, stress corrosion cracking of zirconium alloy sheathing (4) in nuclear reactors. The coating (10) is graphite based and includes ZrO2 and ethylcellulose and acts as a sacrificial layer to immobilize fission products by formation of Zr x I y C type compounds which do not cause stress corrosion , cracking.
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 April 2, 1998 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 2020.
- 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.