Device for preparing bulk material with a dust removal arrangement
CA 2031820 A1 · Owner: Georg Fischer Ag · Inventors: Trondle, Ernst; Satmer, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
7-, Abstract, Arranged in the upper region of a drum (1) which rotates about an axis (2) there is a dust box (40) of the dust removal device, which box is connected with a line, which leads outwards, by way of a laterally arranged discharge channel (48). Arranged between the dust box (40) and a baffle rotor (3) which rotates about the axis (2) there are baffle areas (51) which form labyrinth-like passages for the dust to the dust suction openings (42) in the dust box (40). (Fig. 1)
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 February 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2013.
- 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.