Pradimicin derivatives
CA 2030166 C · Owner: Bristol-Myers Squibb Company · Inventors: Kamei, Hideo; Oki, Toshikazu; Aburaki, Shimpei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are neutral sugar derivatives of pradimicins (BU-3608 antibiotics), their use as antifungal agents, methods for their preparation and intermediates for their synthesis. Said derivatives include a compound having the formula, (see fig.I), wherein R1 is selected from the group consisting of H and hydroxymethyl, and when R1 is hydroxymethyl the resulting, amino acid residue has the D-configuration; and R2 is H or .beta.-D-xylosyl 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 November 16, 1990 and granted October 7, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2012.
- 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.