Filter cartridge with a sieve in an outlet aperture
CA 2211252 A1 · Owner: Brita Wasser-Filter-Systeme Gmbh · Inventors: Bairischer, Uwe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter cartridge is described which can be filled with granular filter material approximately in the shape of a cup open at the top which can be closed with a lid. This filter cartridge has a base (1) with at least one outlet aperture (2) has a sieve, means (12) and side walls (3) and is for filtering liquids in particular water. In order that even small granulate particles of for example, ~ 200 µm wide cannot, pass through the outlet apertures (2) in the base (1) and nevertheless good through, flow of the liquid to be purified is ensured it is provided according to the invention that 1 - 64 outlet apertures (2) are provided each with a fabric insert (12) with, plastics frames (11) with a …
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 July 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 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.