Liquid interferon-.beta. formulations
CA 2304808 C · Owner: Rentschler Biotechnologie Gmbh · Inventors: Siklosi, Thomas; Schroeder, Peter; Hofer, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to liquid formulations of human interferon-.beta.. The inventive formulations are characterised in that they have a buffer with a pH value in the slightly acidic to neutral range between 5 and 8, preferably between 5.5 and 8, and in that the interferon-.beta. is highly stable in solution, the molecular integrity being preserved.
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 September 23, 1998 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 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.