In-situ oxidizing zone remediation system for contaminated groundwater
CA 2129727 A1 · Owner: Chen, Youzhi · Inventors: Chen, Youzhi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention of in-situ oxidizing zone remediation system for contaminated groundwater is a system that releases oxygen or oxidizing gases into a saturated zone of an aquifer (3) to form an oxidizing zone (5) cross the contaminated groundwater plume (4) to purify the groundwater at the location of the plume so as to limit further development of the plume. The system comprises a set of gas injectors (7) embedded in a horizontal well an oxidizing gas source (10), and gas, flow rate controlling (19) and monitoring (20) devices. The gas will be injected through the gas injectors into the groundwater carrying contaminants at the rate that is approximately equal to the rate of the gas dissolving …
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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 August 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 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
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.