Expired Canadian patentCanada
Synthetic heparin pentasaccharides
CA 2806561 C · Owner: Alchemia Limited · Inventors: Singh, Latika; Drinnan, Nicholas Barry; Ramsdale, Tracie Elizabeth
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Preparation of synthetic monosaccharides disaccharides, trisaccharides, tetrasaccharides and pentasaccharides for use in the preparation of synthetic heparinoids.
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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 September 6, 2002 and granted December 22, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 6, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 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.
FiledSeptember 6, 2002
GrantedDecember 22, 2015
Term endedSeptember 6, 2022
Patent numberCA 2806561 C
Classification (IPC)C07H15/20 +2 more
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.