Method of reducing magnesium loss during sintering of aluminium oxide articles
CA 2541708 C · Owner: Horton, Timothy J. · Inventors: Perez, Victor E.; Neil, Jeffrey T.; Horton, Timothy J.
Overview
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A method for reducing the loss of magnesium during the sintering of aluminum oxide articles such as ceramic discharge vessels for lighting applications. Magnesium oxide is added to aluminum oxide articles to control grain growth during sintering but the sintering causes magnesium loss from the article. In order to address this problem one or more aluminum oxide articles that are enriched in magnesium oxide are added to the sintering furnace to stem the loss of magnesium oxide in the remaining articles. The enriched aluminum oxide article is made by soaking a porous aluminum oxide article in an aqueous solution of magnesium nitrate and heating the porous article to convert the magnesium …
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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 April 4, 2006 and granted June 11, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.