Process for the preparation of water-dispersible granules
CA 2012660 C · Owner: Rochling, Hans · Inventors: Rochling, Hans; Schlicht, Rainer; Albrecht, Konrad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Granules can be prepared from powders of active compounds by the counter-current principle by fluidization in a stream of air and spraying of a solution of adhesive. Dispersions or solutions of active compounds can be granulated in accordance with the invention if the aqueous dispersion or solution is sprayed by the counter-current principle into the gas stream of a fluidizing chamber and is caused to fluidize, the formation of granules being started, in a start-up phase at 10 to, 60 % of the maximum gas flow and at only up to 30 % of the maximum feed rate of dispersion or solution and, subsequently the feed rate and the gas flow are increased up to the maximum values for the feed rate and …
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 21, 1990 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2012.
- 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.