Method of removing a mineable product from an underground seam
CA 2076239 C · Owner: Jackson, Daryl L. · Inventors: Jackson, Daryl L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of removing a mineable product such as coal, from an underground, seam of mineable product such as a coal seam includes the steps of drilling a vertical, hole from the earth's surface through the seam of mineable product installing , in the, recovery hole a vertical auger and a pipe extending from the auger to the earth's surface, drilling a plurality of closely spaced apart injection holes from the earth's surface through, the seam of mineable product the injection holes being drilled in a pattern extending from, the recovery hole, inserting an explosive in the seam of mineable product where, penetrated by each of the injection holes sequentially igniting the explosive , in …
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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 August 17, 1992 and granted December 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 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.