Erosion, thermal shock and oxidation resistant refractory compositions
CA 2062307 A1 · Owner: Robinson, Quentin K. · Inventors: Robinson, Quentin K.; Hoggard, Dale B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A refractory material possessing excellent erosion, thermal shock and oxidation resistance as well as, resistance to oxide build up useful in continuous casting of steel for use in such articles as tundish shrouds particularly for slagline sleeves, bore liners and upper seating areas in such shrouds, as well as for stopper rod noses. The material consists of the following by weight: (a) carbon, from about 4% to about 50%; (b) one or more members selected from the group consisting of zirconium di-boride and titanium di-boride in an amount of from about 10% to about 90%: and (c) one or more members selected from the group consisting of zirconia, SiAlON, clay, alumina magnesia, silica, silicon …
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 March 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2014.
- 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.