Direct drill stump jump seeder
CA 2066214 C · Owner: Geddes, Ian · Inventors: Geddes, Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A direct drill seeding unit comprising a coulter wheel (5), a pair of depth control wheels (7) and a splitter (9) where the main components of the seeding unit are pivoted on an elongate arm (1) which is connected to a common or main frame (3). The pivotal movement of the unit allows a gang of the seeding units to follow undulating land in a very faithful manner. Furthermore the splitter (9) is capable of variable height and angle relative to the ground level according to the vertical position of the elongate arm such that as the arm moves up the splitter shall automatically compensate by lowering in order to maintain contact with the soil. The adjustment of the splitter is effected by the …
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 September 17, 1990 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2012.
- 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.