Expired Canadian patentCanada
Method and means for processing oil sands while excavating
CA 2470913 C · Owner: Watson, John David · Inventors: Drake, Ronald D.; Kobler, Michael Helmut; Watson, John David
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mining machine and method of mining hydrocarbon containing minerals such as , oil sands. The machine includes a tunnelling head (701) and a separation device (711) inside, which rotates with the tunnelling head.
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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 January 9, 2003 and granted June 5, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 9, 2003
GrantedJune 5, 2012
Term endedJanuary 9, 2023
Patent numberCA 2470913 C
Classification (IPC)E21C41/24 +2 more
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.