Method of reducing volume of feed liquid required in a porous hollow fibre membrane filtration system
CA 2683000 C · Owner: U.S. Filter Wastewater Group, Inc. · Inventors: Johnson, Warren Thomas; Rogers, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for reducing volume of feed liquid required in a porous membrane filtration system having a number of porous membranes submersed in a volume of feed liquid to be filtered is provided. The method comprises the step of , providing filler elements within said volume of feed liquid to be filtered. The filler , members substantially fills voids between porous membranes and occupy a space that would otherwise be occupied by the volume of feed liquid to be filtered. The filler , members can be provided in the form of a number of elements which fit together to , form an integral unit.
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 October 3, 2001 and granted November 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 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.