Silicon carbide refractory composition and products
CA 2123953 C · Owner: Indresco Inc. · Inventors: Langenohl, Mark C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plastic refractory composition in which the constituents are silicon carbide grain having a SiC content of at least 92% SiC, a calcined or reactive alumina, up to 10% bentonite, and 0.5 to 5% boron phosphate. A phosphorous-containing liquid is used to bind the composition when used. Also disclosed are pressed shapes particularly, tiles, made from such compositions in which ball clay is substituted for the bentonite.
Read the whole patent
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 May 19, 1994 and granted October 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2016.
- 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.