In-line sub-surface seeding, fertilizing and watering system
CA 2387024 C · Owner: Lempriere, Noel D. · Inventors: Lempriere, Noel D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An in-line sub-surface seeding, fertilizing and watering system includes a blade mountable into a header of a parallelogram linkage. A pair of parallel rigid drag arms extend between the header and a hanger assembly and are pinned at their respective ends so that rotation of the header relative to the hanger assembly on the parallel arms maintains a general horizontal orientation of the header thereby supporting the blade downwardly in a constant orientation. The hanger assembly is mountable to a supporting frame. A selective actuator allows selective control of a downward force urging the blade into the soil. An in-line coulter wheel is mounted ahead of and in-line with the blade so as to …
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 May 21, 2002 and granted December 6, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2024.
- 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.