Mixer tube for low viscosity fluids
CA 2199332 C · Owner: Wehrli, Marc Bruno · Inventors: Wehrli, Marc Bruno; Fleischli, Markus; Schneider, Gottlieb
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The mixer tube (1) for low viscosity fluids contains plate-shaped elements (2) which at one or at several points of the tube partially cover off its cross section. The constrictions (3) left free through the elements each comprise at least one gap-shaped region (31) with a, longitudinal extent of this gap (31) which extends from tube wall (10) to tube wall through the tube axis (c) or from the tube wall through the tube axis (c) to a second partial region (32). The gap subtends an angle (f) with the tube axis in the range between about 20 and 60° preferably between 35 and 45°. A mixing path (4) is provided after the constriction in the direction of flow. The fluid to be mixed can contain …
Read the whole patent
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 March 6, 1997 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2019.
- 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.