No-till drill providing seed and fertilizer separation
CA 2000628 C · Owner: Thomas, J. Wade · Inventors: Thomas, J. Wade
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A no-till drill mounts a seed distribution assembly on the upper portion of the back side of a chisel blade that cuts a furrow in the soil being planted. The seed distribution assembly includes a horizontal seed distribution plate having an upturned lip at its rear edge and side walls which extend upwardly from each of its sides. The side walls are joined to the blade at one of their ends and their other ends are separated from the upturned lip of the seed distribution plate. Thus seed which is deposited onto the seed distribution plate from a seed supply tube falls off of the rear portion of the plate between the ends of the side walls and the upturned lip. The seed distribution assembly …
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 October 13, 1989 and granted May 12, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2011.
- 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.