A process for the production of solid forms of active substances and the products obtained in this way
CA 2076527 C · Owner: Heberger, Juergen · Inventors: Rosenberg, Joerg; Heberger, Juergen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for the production of solid forms of active substances, which forms have good redispersibility in aqueous systems, which comprises mixing PEG and dextran with water and - if phase separation occurs - removing the upper phase dissolving, an active substance in the mixture where appropriate, adding a physiologically tolerated amphiphile and, subsequently removing the water.
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 20, 1991 and granted July 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2013.
- 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.