High speed dry grinder
CA 2014658 C · Owner: Union Process, Inc. · Inventors: Szegvari, Arno; Szegvari, Margaret Yang; Just, Arden L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous dry grinder for grinding particulate material with the assistance of grinding elements includes a comminuting vessel (20) which contains the grinding elements (M) and receives material to be ground through an upper feed chute (18) and discharges the ground material through a radially mounted screen (S1), valve and discharge chute (S4). A motor driven agitator assembly is disposed within the vessel and includes alternating, radially projected agitating arms (42) and diverter discs (44) mounted on a rotating agitator shaft (41). The agitating arms are L-shaped and have their short legs (42b) alternately projecting toward the top and bottom (26) of the vessel.
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 17, 1990 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 2012.
- 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.