Decantation centrifuge
CA 2253464 A1 · Owner: Larsson, Lars-Ake · Inventors: Larsson, Lars-Ake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention refers to a decanter centrifuge particularly for sludge centrifugation, incorporating a drum (1) a rotor (12) arranged therein and , equipped with a helical screw (14) for feed of sludge a sludge outlet and a , reject outlet (11 5) and a flush washing device (16) for washing (flushing) in countercurrent to the dewatered sludge. In the rotor (12) in close connection to the blades (15) of the helical screw (14) are provided a number of threaded holes for connection of the nozzles (17) of the flush washing device (16). In response to the washing requirement certain or entire groups , of threaded holes are closable by means of sealing plugs (23) so that the , washing …
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 May 2, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2019.
- 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.