Flat bed reactor for biological cleaning of solids contaminated with toxic substances
CA 2064402 A1 · Owner: Sprenger, Berthold · Inventors: Knackstedt, Hans-Guenther; Sprenger, Berthold; Ebner, Hans G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention consists of a flat bed reactor for the biological cleaning of solids, e.g. with high clay and coarse clay content contaminated with toxic substances, in particular hydrocarbons by bacteria cultures. The solution as per the invention consists of treating the contaminated solids with bacteria cultures and water-based nutrient solutions in a horizontal, transportable flat bed reactor which consists of a rectangular tub (1) open at its upper side with a folding flap (2) and strainer-like holed bottom (3) together with an aeration system (4) and mixing units (5) and a sprinkler system (6). The walls of the tub (1) are designed as a stackable and swivelable support frame (7) with …
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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 March 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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
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.