Mill device
CA 2106226 C · Owner: Kochnev, Vladimir Georgievich · Inventors: Kochnev, Vladimir Georgievich; Simankin, Sergey Albertovich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the invention there is provided a mill drum comprising a hollow drum structure in use mounted to rotate about a substantially horizontal axis extending longitudinally through the bore of the drum structure. The drum structure including lifter means mounted thereto to extend into the bore of the drum structure. The lifter means in use when the drum structure rotates and material to be ground has been introduced into the drum structure, selectively catch and scoop up larger parts or fragments of the mill contents from the bottom of the drum structure while allowing smaller particles to remain at the said bottom. The lifter members thereafter drop the scooped up parts or fragments …
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 15, 1993 and granted August 12, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2015.
- 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.