A process for stabilizing fly ash crushed ore, mine tailings, radioactive hot spots, dust and industrial waste
CA 2314064 A1 · Owner: Nelson, William Ernest · Inventors: Nelson, William Ernest
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Although we tend to envision the air we breathe to be clean the industrial , progress of our era has produced an array of invisible but highly hazardous pollutants that endanger our environment and, jeopardize our health. .cndot. Mining and industrial operations involving large scale excavation and movement of soil, ash, dust and waste material unavoidably lead to significant impacts on the surrounding natural, environment. .cndot. The most damaging impact of many mining operations is the exposure of minerals to the, open air where they may become vulnerable to acidification and release harmful contaminants. This is commonly termed "acid mine drainage," which is the creation of, acidic …
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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 July 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2022.
- 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.