A cleaning efficiency testing method and apparatus for a filter in a filtering system
CA 2467582 A1 · Owner: Tetra Laval Holdings & Finance S.A. · Inventors: Hedstroem, Stefan; Lindau, Jeanette; Hermansson, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus are provided for testing the efficiency of a cleaning procedure for a filter in a filtering system. After the cleaning procedure (21) of the filter, the filter pores contain a fluid (22). The system is pressurized (23), and a decay in pressure over a predetermined time period is measured (24). Based on the pressure decay it is determined whether , or not the cleaning procedure has been effective (25); a pressure decay smaller than a predetermined threshold value indicates that the cleaning procedure has not been effective.
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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 November 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2024.
- 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
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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.