Pharmaceutical preparation with controlled and delayed release of active substance and process for the preparation thereof
CA 1289076 C · Owner: Zierenberg, Bernd · Inventors: Zierenberg, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Controlled and delayed release pharmaceutical composition, The present invention provides a controlled and delayed release pharmaceutical composition comprising a carrier material and a pharmaceutically active substance, said carrier material comprising an emulsion polymer polymerized to a particle size in the range of from 50 to 500 nm and a glass temperature in the range of from -20°C to +80°C. The invention also provides processes for preparing said pharmaceutical compositions.
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
- Granted September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
- 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.