Earth working sweep
CA 2315520 A1 · Owner: Bruce, Douglas G. · Inventors: Bruce, Douglas G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention has several aspects to it one of which is the provision, of a chisel point which is straight and tapered from its thinnest part at the extreme, front to a thicker part at the rear thereof for causing a sweep to wear longer than prior, art sweeps. This sweep also improves soil penetration and is self-sharpening. Another aspect of the present invention is to provide an earth working sweep having a, front end, a right side, a left side and a central upper portion for , connecting the sweep to an implement. It also has a right rear wing portion and a left rear wing portion with, an intermediate portion connecting the front end to the central upper rear portion and, …
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 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2022.
- 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.