Machine for crushing rocks on a potato harvester
CA 2075830 A1 · Owner: Leblond, Michel · Inventors: Leblond, Michel; Picard, Corinne M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is common in a potato harvester to discard rocks separated from potatoes back on to the field. Some times the rocks are collected in a box and then discarded on to the field. In the case of collected rocks, they are discarded on to the field as soon as the box fills up. Another machine is then necessary to remove the rocks from the field. This method is very inefficient because it increases compaction of the soil by increased traffic over the soil. This invention relates to a machine that mounted on a potato harvester will crush the rocks separated by the harvester from potatoes, regardless of their hardness and then discard the crushed rocks. This feature improves the condition of the …
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 August 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 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.