Apparatus for the treatment of liquids including foreign substances
CA 2233651 A1 · Owner: Rochem Ultrafiltrations Systeme Gesellschaft Fur Abwasserreinigung Mbh · Inventors: Vossenkaul, Klaus; Rautenbach, Robert; Heine, Wilhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an apparatus for the treatment of liquids including foreign substances, particularly municipal and commercial waste waters, comprising a membrane separating structure having membrane elements, an inlet for receiving the liquid to be separated and passing it past the membrane elements whereby a permeant portion of the liquid permeates through the membranes and a retent portion becomes enriched with the foreign substances and outlets for discharging the permeant portion and the retent portion, the membrane elements are arranged so as to form together flow channels extending longitudinally through the apparatus and adapted to guide the liquid straight through the flow channels along …
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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 April 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2020.
- 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.