Process and device for filtration
CA 2102344 A1 · Owner: Riemer, Hubert · Inventors: Koch, Manfred; Riemer, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to processes and devices for the filtration of solidliquid-mixtures, in particular solid-liquid-suspensions with readily sedimenting substances, in particular using a rotary filter for instance, under overpressure and in a pressure vessel respectively. The invention is, primarily characterised in that movement in addition to the (natural or usual) filtration movement of the and in the mixture in particular, suspension, respectively is carried out. Conveniently a filtration device according to the invention, in particular with rotary filters for instance, in a pressure vessel, for carrying out the process is characterised in that at least one, preferably partly open …
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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
- Filed November 3, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 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.