Method and apparatus for treating contaminated soil
CA 2046586 A1 · Owner: Barcell, Robert B. · Inventors: Barcell, Robert B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle-mounted system for removing hydrocarbon contaminants from the soil has an inclined rotary kiln (10) which is rotated about a substantially horizontal axis of rotation a burner assembly, (18) at the discharge end of the kiln and a hopper (11) for loading soil into the inlet end to advance through the kiln and be directly heated by the burner assembly. The exhaust stream created in the kiln is drawn through a baghouse (24) for removal of fines, then through a catalytic incinerator (32) to burn any unburned constituents in the exhaust stream. The temperature of the exhaust stream is monitored prior to its passage into the incinerator and at the discharge end of the incinerator as …
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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 November 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2012.
- 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.