Coulter with inside floating scraper and an outside spring closer tine
CA 2230634 C · Owner: Bourgault Industries Ltd. · Inventors: Bourgault, Gerard F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coulter is provided to create furrows in a field while at the same time reducing the amount of soil and debris which accumulates on the coulter disc. The coulter has a disc for creating furrows with a floating scraper blade on the inner side to keep the inner side of the disc free of debris. The scraper blade also assists in maintaining the furrow once it has been opened by the disc. A tine extends across the outer side of the disc in a configuration that prevent soil from adhering to the outer side of the disc and in trash covered fields, trash will wrap around the tine to act as an organic wear pad between the disc and the tine.
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 February 27, 1998 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2020.
- 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.