Agricultural implement for separating & crushing rocks
CA 2075829 A1 · Owner: Lizotte, Marcel · Inventors: Lizotte, Marcel; Gagnon, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An agricultural implement which may be pulled by a tractor in the farm field for improving soil conditions provided with the capability to sort rocks according to their sizes whereby rocks of only desired dimension range are crushed, said implement consisting of a frame carried by two wheels, a drawbar assembly for attaching the frame to a tractor, a rock-transporting tilted belt conveyor assembly provided with a ploughshares means a pair of, corrugated crush rollers, a bin for collecting stones of large dimensions, and a hydraulic power system driven by a drive shaft connected to the power take-off of a tractor.
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.