Pressure-responsive flow regulator and drug delivery devices employing the same
CA 2389540 A1 · Owner: Medrip Ltd. · Inventors: Shekalim, Avraham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid flow regulator (10) of a type having a variable outlet defined by a spacing between an outlet aperture (24) and a flexible diaphragm (14) and in , which the position of the flexible diaphragm (14) varies as a function of a pressure differential between a sensing chamber (16) on a first side of the diaphragm and an outlet chamber (18) on a second side of the diaphragm. The regulator (10) includes an adjustable flow impedance configuration (22) in the flow path from the sensing chamber (16) to the outlet chamber (18) the flow , impedance configuration (22) defined by two cylindrical elements (12 20) , having opposing cylindrical surfaces (26 28) which are in sliding contact. , …
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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 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2022.
- 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.