Bioremediation of contaminated groundwater
CA 2122269 A1 · Owner: Fliermans, Carl B. · Inventors: Hazen, Terry C.; Fliermans, Carl B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for in situ remediation of subsurface soil of groundwater contaminated by chlorinated hydrocarbons. A nutrient fluid is selected to stimulate the growth and reproduction of indigenous subsurface microorganisms capable of aerobically degrading the contaminants and an oxygenated fluid is selected to create an aerobic environment for the microorganisms. The nutrient fluid is injected periodically and the oxygenated fluid is injected continuously through a well (26) in such a way as to draw the fluids through the plume (14). Treatment is continued until the concentration of contaminants is reduced to an acceptablelevel. For example the nutrient fluid can be methane and the oxygenated …
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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 26, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 26, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 26, 2015.
- 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.