Product sensors for air seeder
CA 2298989 C · Owner: Deere & Company · Inventors: Detrick, Steve Blaine; Gregor, David Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The product meter of an air seeder is vertically positioned between a product tank and a primary air distribution manifold. The product meter is provided with an inlet passage and an outlet passage. Product from the product tank is received in the inlet passage where it is directed to the metering chamber. A meter roller is located in the metering chamber for metering the product received from the product tank. After the product has been metered it is transported though the outlet passage to the primary distribution manifold. Optical product sensors may be located in either the inlet passage or the outlet passage to detect the operation of the product meter.
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 18, 2000 and granted November 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 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.