Heating aluminum nitride with reducing additives to produce high thermal conductivity ceramics
CA 1265914 C · Owner: Bobik, Carl Francis · Inventors: Huseby, Irvin Charles; Bobik, Carl Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing an aluminum nitride ceramic body having a composition defined and encompassed by polygon JKLM but not including line MJ of Figure 4 and a thermal conductivity greater than 1.00 W/cm?K at 25°C preferably greater than 1.42 W/cm?K at 25°C which comprises, forming a mixture comprised of aluminum nitride powder containing oxygen, yttrium oxide, and free carbon shaping, said mixture into a compact, said mixture and said compact having a composition wherein the equivalent % of yttrium and aluminum ranges from point L to less than point J of Figure 4, said compact having an equivalent % composition of Y Al, O and N outside the composition defined and encompassed by polygon …
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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
- Granted February 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 2007.
- 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.