Insulating refractory material
CA 2334725 A1 · Owner: Vesuvius Crucible Company · Inventors: Brandy, Gilbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an insulating refractory material comprised of 20-80 % by weight of a ceramic matrix, 5-40 % by weight of insulating microspheres 0.5-15 % by weight of one or more binders and 0-5 % by weight of water. The ceramic matrix is comprised of vitreous grains notably atomized silica. It , also contains 0.5-4 % by weight of a deflocculant and 0.5-4 % by weight of colloidal silica. The insulating microspheres are hollow spheres of a material based on silica and alumina. They contain 55-65 % by weight of silica and 27- 33 % by weight of alumina.
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 June 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2021.
- 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.