Filtering system
CA 2442093 A1 · Owner: Scharstuhl, Johan Jan · Inventors: Scharstuhl, Johan Jan; Scharstuhl, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filtering system comprising an inlet (11) for liquid to be filtered and an outlet (9) for filtered liquid, as well as filtering means which system is , characterized in that the filtering means placed in series comprise: a first , filter (2) comprising activated carbon with the capability to also remove particles that are larger than approximately 0.5 µm; an ultrafiltration membrane (5) for the removal of particles that are larger than approximately 0.02 µm; a post-treatment filter (14) of activated carbon optionally , provided with a microfiltration membrane (13) wherein the system also , comprises a vessel (6) for filtered water located between the ultrafiltration membrane (5) and …
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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 March 18, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 18, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 2024.
- 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.