Method for recycling zirconium tetrafluoride to form zirconia
CA 2611225 C · Owner: Lasalmonie, David · Inventors: Lasalmonie, David; Chittaro, Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for converting ZrF4 into ZrO2 by thermally converting solid ZrF4 and water heated in a reactor to form ZrO2. The initial weight ratio ZrF4 on water is especially between 1/5 and 1/500 preferably between 1/10 and 1/200, more specifically between 1/15 and 1/100 and said ratio is preferably maintained essentially throughout the conversion. The thermal conversion is carried out at a temperature which is higher than or equal to, 300 °C, especially between 300 and 800 °C preferably between 300 and 600 °C, more specifically between 350 and 450 °C. The invention especially relates to the recycling of the zirconium alloy stripping baths.
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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, 2006 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.