Method for preparing human immunoglobulin concentrates for therapeutic use
CA 2446704 C · Owner: Paolantonacci, Philippe · Inventors: Schmitthaeusler, Roland; Chtourou, Abdessatar Sami; Lirochon, Jacky
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for preparing human immunoglobulin concentrates for therapeutic use from plasma or a plasma fraction. The method comprises pre-purification and a single anion-exchange chromatography carried out at alkaline pH thereby enabling the immunoglobulins to be retained on the chromatographic support and fractionated. The method enables to obtain IgG IgA and IgM concentrates.
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 April 24, 2002 and granted September 24, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2024.
- 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.