Gravel scarifying and levelling device
CA 2043985 A1 · Owner: 936465 Ontario Inc. · Inventors: Scott, Norman Leslie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A scarifier/grader apparatus comprises in combination, a tractor, connected through a 3-point hitch to a scarifier/grader attachment wherein:, the tractor is adapted to be operably connected through a three point hitch to a scarifier/grader attachment comprising a scarifier including hydraulics for raising and lowering a plurality of scarifying teeth borne thereon;, a grading blade having a mold board and a cutting edge, a second frame interconnecting the scarifier frame and the blade in mutually spaced apart relation with the scarifier in operably leading relation and the blade in operably trailing relation, wherein the scarifier includes height-adjusting hydraulics for selectively raising …
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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 June 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2013.
- 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.