Method and apparatus for the production of nodular or compacted graphite iron castings
CA 2068772 A1 · Owner: Foseco International Limited · Inventors: Eisenacher, Wilfried; Fessel, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing nodular or compacted graphite iron castings in a mould having a sprue an, ingate and a mould cavity, having a first part below and a second part above the level of the ingate comprises delivering particulate magnesium-containing and silicon-containing treatment agent from a dispenser into a stream of molten metal entering the sprue such that the treatment agent is added at a constant rate of addition while the first part of the mould cavity is filled with iron, and at a decreasing rate while the second part is filled. The addition of the treatment agent is controlled by means of apparatus comprising a container, a measuring and data capture device connected via signal …
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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 May 15, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2014.
- 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
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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.