Fluid separation cells and spacers for use in these
CA 1261283 A · Owner: Permutit Company Limited (The) · Inventors: Stolberg, Errol M.; Foster, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spacer sheet for use together with another spacer sheet between adjacent membranes 17 in a fluid separation cell, for example an electrodialysis cell has an open, centre 2, conduit passages 8 and 9 for the supply and withdrawal of fluid to the chamber formed by the open centre 2 between the membranes 17, and slots consisting of an offset slot stern 13 and a narrow mouth 14 opening into either the open centre 2 or the conduit passage 8 or 9. The slots of the 2 sheets of a spacer assembly cooperate to provide a passage for fluid between the conduit passage and the open centre. Identical spacer assemblies may be used between memberanes in adjacent cell pairs by positioning them mutually …
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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
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.