Long-acting biodegradable microparticles and a process for their preparation
CA 2063883 C · Owner: Hoechst Aktiengesellschaft · Inventors: Sandow, Juergen; Lill, Norbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Long-acting biodegradable microparticles containing therapeutically active peptides as the active substance and poly(lactide-co-glycolide) as the carrier material are described which are obtained by spray drying at temperatures below 60°C at a spray flow rate of above 500 NL/h.
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 24, 1992 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2014.
- 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.