Method and apparatus for screening granular materials
CA 2119368 C · Owner: Mogensen, Peder · Inventors: Mogensen, Peder
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for separating a collection of particles according to size shape and/or density, whereby the collection of particles being fed through a vibrating space with classifying elements (1 7-11) in the form of screen cloths, wires or bars. The invention is characterized by that the classifying elements have a more vigorous movement (3) mostly perpendicular to the classifying elements near the inlet end of the space and a more gentle movement (4) which is more horizontal at the outlet end of the space.
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 September 24, 1992 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2014.
- 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.