Method of making mass transfer apparatus
CA 1112580 A · Owner: American Hospital Supply Corporation · Inventors: Borsanyi, Alexander S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of manufacturing a mass transfer apparatus is disclosed, comprising the following steps: (a) making up an assemblage comprising a semipermeable membrane folded in accordion-like manner into a number of closely spaced pleats around support members inserted into or between the pleats on one side only of said membrane, the folded membrane and support members being interposed between two flat and rigid plates of uniform thickness;, (b) introducing said assemblage between the two platens or a press movable with respect to each other the, opposing faces of the platens remaining constantly parallel during all positions of the platens;, (c) exerting a predetermined and uniformlydistributed …
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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 November 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
- 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.