A cutting assembly and related apparatuses
CA 2359237 A1 · Owner: J.R. French Limited · Inventors: French, John Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
In the field of clearance of unexploded ordnance from land there is a need , for an improved apparatus for removing unexploded ordnance from the ground. A cutting apparatus (10) includes a plurality of blades (13) on a rotatable shaft, the blades (13) being tapered towards their distal ends. When the blades (13) are driven forwardly through soil while the shaft rotates they , tend to loosen items such as solid ordnance and bring such items to the soil surface. The blades (13) simultaneously sever scissile matter in the soil thereby facilitating removal of the ordnance. The cutting assembly (10) includes a conveyor (22) for conveying unexploded ordnance away from the soil. The cutting …
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.
Why it's free to use
- Filed December 29, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2021.
- 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.