Stabilization of mine tailings deposit areas
CA 2010885 C · Owner: Sheridan, John Patrick · Inventors: Sheridan, John Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a method of stabilizing tailings deposits for mine tailings as well as to a method which permits re-vegetation of those tailings deposits. Mine tailings are generally finely divided, homogenous rock and other mineral particles, which are unstable due to their fineness and particle size. The invention provides a method of stabilizing the tailings deposits by interspersing throughout the tailings deposits a plurality of very large aggregate pieces which are immensely larger than the particles of the tailings. The very large aggregate pieces may very conveniently be used automotive tires. The tires are generally placed in non-uniform layers throughout the tailings …
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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 February 26, 1990 and granted May 15, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.