Filter
CA 2414883 A1 · Owner: Erkinger, Werner · Inventors: Zegg, Herbert; Erkinger, Werner
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 filter (1) comprising a plurality of rotating filter disks (3) which are arranged on a shaft (2) and are provided with a porous filter medium. The invention is characterised in that elastomer elements (8, 8') are used as spacers and are arranged between each individual filter disk (3) on the shaft (2). The invention also relates to a filter disk (3) for one such filter (1).
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 June 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2023.
- 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.