Method and apparatus for the two-stage crushing of brittle material for grinding
CA 1284975 C · Owner: Mersmann, Heinz-Georg · Inventors: Mersmann, Heinz-Georg; Kropf, Hardy; Adrian, Franz Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and apparatus for the two-stage crushing of brittle material for grinding using a roll mill and a mill connected after it. The quantity of grit obtained in the sifting operation is divided between the roll mill and the subsequent mill in such a way that the sum of the quantity of fresh material and the quantity of grit delivered to the roll mill remains constant.
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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
- Granted June 18, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2008.
- 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
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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.