Toxic waste fixant and method for making and using same
CA 2107007 A1 · Owner: Harbour Remediation & Transfer Inc. · Inventors: Newton, Jeffrey P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A toxic waste fixant for detoxification of a contaminated soil sediment, and orsludge material includes a mixture of: ferric sulfate manganese sulfate, and oraluminum sulfate and or Portland cement and or gypsum ( calcium sulfate ), and or blast furnace slag and or lime ( calcium oxide ). Fixants made from mixtures of the above compounds are designed to prevent leaching in excess of regulatory standards for specified inorganic and organic toxic compounds and elements. These fixants will also reduce the concentration of most organic toxic compounds through various chemical reactions and bonding as determined by solvent extractions and analysis by GC/MS.
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 September 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 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.