Methods for purifying highly anionic proteins
CA 2404155 C · Owner: Sun, Shujun · Inventors: Germain, Bonnie J.; Sun, Shujun; Coffman, Jonathan L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for isolating and purifying highly anionic target proteins, for example, sulfated proteins. Sulfated proteins have five (5) or more, sulfations. In a preferred embodiment the sulfated , protein has six (6) sulfations e.g. six sulfations on N-terminal tyrosine residues, as embodied in PSGL-1 (P-selectin glycoprotein ligand).
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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 27, 2001 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2023.
- 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.