Purification of liquid metals
CA 1251328 A · Owner: Harris, Ralph · Inventors: Wraith, Albert E.; Harris, Ralph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metallic impurities are removed from a bath of molten metal, in a vacuum chamber, by applying vacuum effective to produce a bulk flow of gases from the surface of the metal accessible to the vacuum. An upwardly moving stream of molten metal and a lifting gas are formed by cycling metal from within the bath and leading it under confinement in risers to a position above the bath surface and releasing it from the risers to provide a spray of metal droplets which shower onto the bath surface. Impurities are continuously isolated from the bath. The size of the bubbles are controlled so that the droplets of molten metal in the spray are within the range from about 1 to about 10.mm. This is done …
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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
- Granted March 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
- 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.