Improvements to chemical washing and, particularly to rinsing of separating membrane devices for solutions and suspension
CA 2380061 A1 · Owner: Moulart, Pierre · Inventors: Moulart, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method whereby the membranes (2) are washed with detergents or adsorbable chemical or biochemical products on activated carbon. The final rinsing for eliminating the detergents is carried out by passing water through the membrane (2) until the residual concentration of detergents is brought below the maximum permissible concentration in water for human consumption. The improvements are characterised in that the method consists in: drawing for specific treatment external to the system one first part of rinsing water of the order of 10 to 20 % of the total volume of water required for final rinsing; introducing the powdered activated carbon in the equipment recycling …
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 4, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 2022.
- 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.