Method and device for testing the quality of a sheet-like element comprising a membrane
CA 2258402 A1 · Owner: Kabs, Hermann · Inventors: Kabs, Hermann; Meissner, Dieter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device for testing the quality of a sheet-like element (1) comprising a membrane (2) are presented. The quality test is limited to a part area, of the sheet-like element (1), in that a useful material (7) provided for the , use of, the sheet-like element (1) is fed to one side of the sheet-like element (1) via a, useful-material outlet orifice (8) of a housing (5 5a, 5b), the area bounded , by the, useful-material outlet orifice corresponding to the part area to be tested. This method is appropriate in particular, in the production of large-area membranes or membrane/electrode units provided for use in fuel cells. The quality, test can take place in a simple way even …
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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 January 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2021.
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Timeline
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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.