Process for preparing glycopeptides having asparagine-linked oligosaccharides, and the glycopeptides
CA 2822657 C · Owner: Kajihara, Yasuhiro · Inventors: Kajihara, Yasuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A glycopeptide having at least one asparagine-linked oligosaccharide at a desired position of the peptide chain thereof which is obtained by: (1) esterifying a hydroxyl group of a resin having the hydroxyl group and a carboxyl group of an amino acid having amino group nitrogen protected with a fat-soluble protective group (2) removing the fat-soluble protective group to form a free amino group (3) amidating the free amino group and a carboxyl group of an amino acid having amino group nitrogen protected with a fat- soluble protective group (4) removing the fat-soluble protective group to form a free amino group (5) repeating the steps (3) and (4) at least once (6) amidating the free amino …
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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 July 4, 2003 and granted November 17, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 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
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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.