Permeable membrane
CA 2463141 A1 · Owner: Voith Fabrics Heidenheim Gmbh & Co. Kg · Inventors: Beck, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A permeable membrane for use on displacement presses of the type described in US 6190,506, or for converting air presses such as those described in US , 6,454,905 WO 99/23301 and WO 99/23296, into a displacement press. The membrane 2 comprising a laminate structure having at least one permeable wear layer 12, 14 and at least one semi-permeable perforated sheet layer 4.
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 December 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 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.