Agitator ball mill
CA 2002550 C · Owner: Eirich, Paul · Inventors: Durr, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An agitator ball mill comprises a grinding container having a cylindrical grinding chamber which is defined by a grinding-chamber wall. At least one agitator, which is provided with projecting agitating tools is arranged in said grinding chamber. The agitator and the grinding container can be rotatably driven about their respective axes which are parallel to each other. The grinding chamber is partially filled with auxiliary grinding bodies and has a grinding-stock supply means and a grinding-stock discharge means comprising a grinding-stock/auxiliarygrinding-bodies separating device. The agitator axis has an eccentricity with respect to the central longitudinal axis of the grinding …
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 November 8, 1989 and granted June 8, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2011.
- 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.