Method for producing a silicon nitride base sintered body
CA 1094110 A · Owner: Kabushiki Kaisha Toyota Chuo Kenkyusho · Inventors: Masaki, Hideyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silicon nitride base sintered body having high strength and high density is formed by a normal sintering namely by sintering without pressure. The sintered body is produced of silicon nitride and the metal oxides yttrium oxide and cerium oxide. A silicon nitride base sintered body having yet a higher strength and higher density can be produced by heating yttrium oxide and cerium oxide together for forming Y2O3 2CeO2 before sintering.
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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 January 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 1998.
- 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.