Molten metal pump and furnace for use therewith
CA 2459889 A1 · Owner: Areaux, Larry · Inventors: Areaux, Larry D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal melting closed furnace (10) which includes a main chamber (26) a , circulation well (28) connected to the main chamber (26) by a communications passageway and a vortex well (84) having an exit outlet for molten metal into the main chamber (26). A cover (138) is emplaced over the vortex well (84). An inert gas bubble activated molten metal pump (48) is provided in which there is an entry port in the circulation well (28) and exit port (64) tangentially arranged with respect to the periphery of the cavity. This exit port (64) will typically be at or near the top of the vortex well (84). In order to reduce oxidation, inert gas bubbles are captured from this molten metal pump …
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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 September 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2024.
- 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.