Process for preparing aluminium nitride powder via controlled combustion nitridation
CA 2106669 A1 · Owner: Moore, William G. · Inventors: Weimer, Alan W.; Henley, John P.; Cochran, Gene A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rapidly heat powdered aluminum metal whether alone or in, admixture with a previously prepared aluminum nitride powder or a powdered removable or compatible material in the presence of a source , of nitrogen to a temperature within a range of 1873 to 2373 K to convert the powdered aluminum metal to aluminum nitride then, promptly quench the aluminum nitride product. Substantially all of the aluminum metal particles are heated at a heating rate of from 100 K to 10,000,000 K per second. The aluminum metal powder or admixture containing aluminum metal powder is maintained at that temperature for period of 0.2 to 10 seconds. The product has a surface area between 2 and 8 square meters per …
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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 December 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2013.
- 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.