Nozzle and method of blowing hot metal
CA 2179917 A1 · Owner: Mefos, Stiftelsen For Metallurgisk Forskning · Inventors: Inomoto, Takeo; Bergman, Dan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An annular nozzle for an oxygen lance, e.g. an oxygen lance for blowing steel in a converter gives an annular hot spot on the liquid steel in the converter . When exiting the nozzle the annular jet has disruptions that result in ambient atmosphere being sucked in towards the centre of the annular jet. Thus, a sub-pressure is prevented which would otherwise prevent the jet from diverging conically. In one embodiment, the nozzle can be switched during a blowing operation between forming a tight jet and forming a diverging jet.
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 December 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 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.