Method and equipment for feeding a counter jet mill
CA 2395158 A1 · Owner: Niemi, Jouko · Inventors: Niemi, Jouko; Ilmasti, Veikko; Suominen, Hannu L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns a method and a device for feeding a counter jet mill with material to be ground, wherein the material to be ground is pressurized intermittently and after being pressurized the pressurized material batch is dropped into an equalizing tank (4), wherefrom it through a fluidization is led as a continuous stream of a gas-solids suspension through acceleration nozzles (8) of the counter jet mill to a grinding chamber (9) wherein solid , particles are ground on colliding against each other. The invention is characterized in that the intermittent pressurizing is carried out to a considerably higher pressure than the fluidizing pressure in order to secure proceeding …
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 December 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 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.