Granular herbicide applicator
CA 1313795 C · Owner: Coquet, Richard P. · Inventors: Bourgault, Gerard F.; Weenk, Alan D.; Allan, Ronald H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A two-hopper air seeder and a cultivator are modified to permit the simultaneous distribution of seed/fertilizer and granular herbicide. The air stream of the seeder is split into two air streams, one of which conducts seed/fertilizer from one hopper to the shanks of the cultivator and the other of which, conducts granular herbicide from the other hopper to the front of the cultivator.
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
- Granted February 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2010.
- 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.