Mining apparatus
CA 2106162 A1 · Owner: Dickerson, Alan William · Inventors: Dickerson, Alan William; Mai, Viet Kinh Luan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for removing overburden or for mining a mineral from a valuable mineral or coal deposit such as in an open pit mine, is disclosed. The apparatus comprises a cross-pit vehicle which is adapted to move between the high wall and low wall sides of the pit and as, it moves across the pit floor, to cut overburden from the pit floor and to carry the dislodged overburden to the low wall side of the pit. The apparatus further comprises a winch assembly on the low wall side of the pit and a cable which connects the low wall winch assembly to the crosspit vehicle. The apparatus further comprises a winch assembly on the high wall side of the pit and a cable which connects the high wall …
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 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 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.