Water purification set and chemicals unit therefor
CA 2005492 A1 · Owner: Duphar International Research B.V. · Inventors: Steenhuisen, Johannes E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a water purification set comprising a container holding a filtering unit and a chemicals unit, said container comprising two compartments having such dimensions that the filtering unit can be accommodated in one compartment and the chemicals unit can be accommodated in the other compartment, and in which the compartment holding the filtering unit can be closed separately by means of a cover, the cover of the compartment holding the chemicals unit being proportioned so that the said latter cover, in closed condition of the compartment holding the filtering unit, can at least partly also cover the cover of the said latter compartment. The invention further relates to …
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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 December 14, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2011.
- 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.