Fluid flow control in curved capillary channels
CA 2331588 A1 · Owner: Roche Diagnostics Gmbh · Inventors: Reiser, Wolfgang Otto Ludwig; Shelton, Jeffrey N.; Bhullar, Raghbir Singh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A capillary pathway is dimensioned so that the driving force for the movement of liquid, through the capillary pathway arises from capillary pressure. A plurality of groups of, microstructures are fixed in the capillary pathway within discrete segments of the, pathway for facilitating the transport of a liquid around curved portions of pathway. Capillary channels can be coupled between two adjacent groups of microstructures to, either the inner and outer wall of the capillary pathway. The width of each capillary, channel is generally smaller than the capillary pathway to which it is connected, and can, be varied to achieve differences in fill initiation. The grouped microstructures …
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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 22, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2023.
- 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.