Method and apparatus for removing bottom dross from molten metal
CA 2258482 C · Owner: Meneice, David J. · Inventors: Meneice, David J.; Boston, Steven L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for removing bottom dross from molten zinc (11) contained in a coating pot (10) includes a pump (22), a traversing carriage (16) for positioning the inlet of the pump in a desired horizontal location and a slide mechanism (18) for positioning the inlet of the pump in a desired vertical location. The pump is moved in horizontal and vertical direction to remove the accumulated bottom dross. The bottom dross contained in molten zinc is pumped into a V-shaped channel (39) and allowed to flow into either a removable basket (51) or into a pre-melt pot (53). The pump of the present invention is a pedestal, centrifugal graphite pump powered by an air motor. The pump has a …
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 June 18, 1997 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.