Method and device for improving tapping of liquid steel from a smelting furnace into a ladle
CA 2220468 A1 · Owner: Pleschiutschnigg, Fritz-Peter · Inventors: Pleschiutschnigg, Fritz-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device for improving tapping of liquid steel during the entire tapping period of the steel from a smelting furnace into a ladle. Between the tap hole of the furnace and the ladle bottom or the steel in the ladle an oxygen-free atmosphere with a pressure of > 1 bar is maintained. In the device for carrying out the method, a ladle dome is arranged between the furnace tap and the ladle and the ladle is connected to at least one gas supply.
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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 November 10, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2019.
- 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.