Device for singulating particles including a rapid, single kernel grain characterization system
CA 2081662 C · Owner: Rousser, Robert · Inventors: Martin, Charles R.; Brabec, Daniel L.; Rousser, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A feeding device singulates, orients, and delivers seeds and other comparatively smooth-surfaced particulate material to a desired destination. The device comprises a horizontal rotating drum (2) having an inner surface cut with a spiral groove (6) for orienting ellipsoid-shaped particles and advancing them to the location of pickup orifices (8) within the drum (2). A vacuum valve (15) alternately subjects the orifices (8) to vacuum and ambient pressure (13) for picking, up the individual particles and releasing them to the desired point of delivery (21).
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 April 22, 1991 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2013.
- 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.