Seed bed soil conditioner
CA 2354980 A1 · Owner: Preston, Richard C. · Inventors: Preston, Richard C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a curved vibrating plate drawn slideably and frictionally behind the packer wheel of a seeding implement thus causing the seeded, soil to be further packed and to be of fine texture thereby reducing the loss of moisture from the seedbed by creating a denser soil layer at the surface. ,
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 July 30, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2023.
- 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.