Method for producing sintered silicon carbide articles
CA 1252612 A · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Mouri, Masahide; Nomura, Yoshisaburo; Yamada, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Production of sintered silicon carbide articles by mixing a tar pitch in an amount to provide 4.2-6 parts by weight of carbon after being carbonized and boron or a boron compound in an amount corresponding to 0.03 - 0.15 parts by weight of boron content as densification aids with 100 parts by weight of a finely divided silicon carbide powder, shaping the resulting mixture, and sintering the shaped article in an inert atmosphere at a temperature of from 1900 to 2300°C. The articles can be produced with increased sintered density and mechanical strength.
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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 April 18, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 18, 2006.
- 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.