Synthesis of acyclic nucleoside derivatives
CA 2723085 A1 · Owner: Medivir Ab · Inventors: Wayne, Greg; Patel, Ramesh R.; Singam, Pulla Reddy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and novel intermediates for the preparation of acyclic nucleoside derivatives of formula (I) where one of R1 and R2 is an amino acid acyl group and the , other of R1 and R2 is a -C(O)C3-C21 saturated or monounsaturated optionally , substituted alkyl and R3 is OH or H; or a pharmaceutically acceptable salt thereof.
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 February 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2020.
- 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.