Combine straw and chaff spreader
CA 2309480 A1 · Owner: Hofer, David A. · Inventors: Hofer, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A straw and chaff spreader including a pair of counter-rotating spreader plates having fan-shaped blades attached to the top surface of each spreader plate. The spreader plates being located beneath the straw and chaff chute of a combine. A rear shield is mounted to the combine to the rear of the spreader plates. The shape of the blades and the direction of rotation of the spreader plates being selected to throw the straw and chaff received from the straw and chaff chute against the rear shield to propel the straw and chaff outwardly on either side of the combine.
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 26, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2022.
- 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.