Pumps for pumping molten metal
CA 2298038 A1 · Owner: Thut, Bruno H. · Inventors: Thut, Bruno H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nonmetallic pump for pumping molten metal includes a base with an impeller chamber, at least one molten metal inlet opening to the base at least one , molten metal, outlet opening from the base and an impeller connected to one end of a motor driven, shaft and rotatable in the impeller chamber. The base includes a shell portion and a one-piece , insert formed of nonmetallic heat-resistant material disposed in the impeller chamber. The insert includes a generally circular bore in which the impeller is disposed and a wall, extending so as to form a spiral-shaped volute opening around the bore. An egress, channel extends from the volute opening toward the molten metal outlet opening. …
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 February 2, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2022.
- 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.