Systems and processes for pyrolyzing contaminates on foundry sand and combusting the resulting gas
CA 2134590 C · Owner: Bury, Roland P. A. G. · Inventors: Bury, Roland P. A. G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to combusting contaminants on foundry sand in a container (13) rotating about an axis (A) at a particular angle with a particularly placed oxygen-fuel burner (32). As the container (13) rotates about the axis (A), the oxygen-fuel burner (32) fires a flame and excess oxygen at a particular angle to enhance pyrolysis of the contaminants. The amount of excess oxygen is such that the resulting off gas contains at least 2% oxygen by volume, thus preventing or substantially minimizing products of incomplete combustion from leaving the container (13). After having pyrolyzed the contaminants, the firing of a flame and excess oxygen from the oxygen-fuel burner (32) may be …
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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 October 28, 1994 and granted September 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2016.
- 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.