Process for rendering inert and/or immobilizing enviromentally harmful substances
CA 2063395 A1 · Owner: Techform Engineering Ag · Inventors: Jung, Fritz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is useful for rendering inert and/or immobilizing inorganic and/or organic environmentally harmful substances in aqueous dispersion, suspensions, emulsions and/or solutions of waste materials. At least one inorganic binder in particular based on, portland cement clinker clay cement klinker and/or hydraulic lime is added to the dispersion, suspension emulsion and/or solution, possibly before during or after a treatment to precipitate and/or convert the heavy metals, sulphur compounds other harmful, substances and/or organic compounds in the dispersion suspension, emulsion and/or solution. A homogeneous mixture of the harmful material(s) and the binder(s) in the dispersion …
Read the whole patent
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 July 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 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.