Expired Canadian patentCanada
Coiled membrane filtration system
CA 2201603 C · Owner: Belfort, Georges · Inventors: Belfort, Georges
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for achieving reverse osmosis microfiltration, nanofiltration and ultrafiltration produces Dean vortices against a membrane surface which is advantageously in a form of a wound helical membrane tube (34).
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 August 2, 1996 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 2, 1996
GrantedMay 8, 2001
Term endedAugust 2, 2016
Patent numberCA 2201603 C
Classification (IPC)B01D65/08 +2 more
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.