Method for fixing waste material
CA 2085850 A1 · Owner: Hooykaas, Carel W. J. · Inventors: Hooykaas, Carel W. J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for fixing toxic or nontoxic waste material, in which method the waste material is allowed to absorb into an organic absorbent the waste material-containing absorbent thus obtained is treated with an occluding agent and the resulting product is mixed with a hydraulic binder and a hardening activator in order to form a cement matrix. The occluding agent used in preferably a silicon compound, such as silica gel or water glass, or a silicon polymer which can be formed from granulated blast furnace slags. The absorbent used can be an organo-clay compound and/or cellulose. The invention also relates to a composite kit for fixing waste material comprising an …
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 December 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 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.