Process for producing silicon carbide platelets and the platelets so-produced
CA 2004280 A1 · Owner: Jain, Mukesh K. · Inventors: Nadkarni, Sadashiv K.; Jain, Mukesh K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1, TITLE : PROCESS FOR PRODUCING SILICON CARBIDE PLATELETS AND THE PLATELETS SO-PRODUCED, ABSTRACT OF THE DISCLOSURE A process for producing silicon carbide platelets and the platelets so produced. The process comprises reacting particles of a non-graphitizable form of hard carbon containing 0.5-1.5% by weight of aluminum and at least 0.2% by weight of iron (preferably anthracite coal, most preferably Pennsylvania anthracite), with silica or a silica precursor at a temperature in the range of 1900 - 2100°C under an inert atmosphere. If the carbon contains 0.2 - 1.0% by weight of iron 0.1 - 10% by weight, of boron, relative to the weight of sio2 is added (if not, already present). The carbon …
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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 November 30, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2011.
- 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
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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.