Gas purged nozzle
CA 2497298 A1 · Owner: Vesuvius Crucible Company · Inventors: Richaud, Johan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nozzle (1) is described for delivering a flow of liquid metal from a metallurgical vessel. In combination with inert gas the nozzle can shield the , flow of liquid metal from oxygen and additionally, can be used to purge , liquid metal residing in the metallurgical vessel. The nozzle includes a substantially gas-impermeable liner (9) surrounded by a permeable composition (10). The gas-impermeable liner may comprise a resin-bonded material and the , permeable liner is preferably a carbon-bonded or castable refractory. A metal housing (14) may surround the nozzle.
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 September 2, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 2, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2025.
- 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.