Separation medium and method for its preparation
CA 2508271 A1 · Owner: Ge Healthcare Bio-Sciences Ab · Inventors: Buckley, David; Busson, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method of preparing a separation medium which method comprises to provide a slurry of essentially spherical polymer beads in an aqueous solution of a natural polymer and contacting the slurry with an organic solvent in the presence of emulsifier to allow aggregation of the beads. In a preferred embodiment, the natural polymer is agarose. The present invention also encompasses a separation medium comprised of one or more aggregates, wherein each aggregate comprises a plurality of porous and essentially spherical polymer beads assembled by a porous gel.
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 December 16, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2025.
- 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.