Riser knock-out and riser topping gathering apparatus and system
CA 2269884 A1 · Owner: Griffin Wheel Company · Inventors: Sieradzki, Christopher Z.; Smorynski, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Casting molds used in producing cast metal products have riser cavities and have waste, metal risers and waste riser topping material with the riser cavities. The invention discloses a, riser knock-out and riser topping gathering apparatus and system. The apparatus has plungers, to enter the riser cavities in a portion of a metal casting mold. The plungers have ends to push, the waste metal risers out of the cavities. The ends may be nose-pieces connected through, spaced ribs to a hollow inner conduit. Each plunger may also have a wire brush assembly for, removing baked sand from the wall of the riser cavity. The wire brush assembly has an inner, diameter that is spaced from the …
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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 April 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2021.
- 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.