Sorting apparatus
CA 2244444 C · Owner: Lenko, Samuel · Inventors: Gifford, Philip Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sorting apparatus includes a first grating of spaced parallel bars and a second grating of spaced parallel bars positioned parallel to the first grating. Relative lateral movement of the first grating and the second grating alters the lateral spacing between the parallel bars of the first grating in relation to the parallel bars of the second grating. This enables rocks to be sorted into three piles; a first pile of rocks that will pass through when openings in the first grating and second grating are out of register a second pile of rocks, that will pass through only when openings in the first grating and second grating are in register, and a third pile of rocks that will not pass …
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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 31, 1998 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2020.
- 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.