Apparatus and process for encapsulating microbial, vegetable and animal cells or biological and chemical substances
CA 2254536 A1 · Owner: Pluss-Wenzinger, Raphael · Inventors: Widmer, Fritz; Pluss-Wenzinger, Raphael; Brandenberger, Harry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for the encapsulation of microbial vegetable and, animal cells or biological and chemical substances through a nozzle into small, substantially spherical particles by vibration of an immobilization mixture, the latter is divided into equal-sized fractions by the superimposition of an external vibration. The vibration - preferably in the range of between 300 and 4000 Hz - is transmitted to the immobilization mixture within a pulsation space, possibly by way of the nozzle which is caused to pulsate.
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 November 26, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2020.
- 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.