Sealing means for electrically driven water purification units and method of manufacturing thereof
CA 2279201 A1 · Owner: Cotton, Bill · Inventors: Moffett, Thomas; Jinnah, Tazim; Smith, Neil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrically driven membrane process apparatus is provided comprising a first, spacer having a perimeter having a surface with an inner peripheral edge defining an opening, and a recess formed on the inner peripheral edge and an ion exchange membrane , having an outer edge fitted within the recess. The spacer can further comprise a plurality of bosses and, an ion exchange membrane having a corresponding plurality of apertures for receiving the, bosses. The spacer can include a plastic mesh consisting essentially of polypropylene or, polyethylene, and a perimeter surrounding the plastic mesh the perimeter , comprising, material selected from the group consisting of thermoplastic …
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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 30, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2021.
- 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.