Digoxin derivatives
CA 1069495 A · Owner: Boehringer Mannheim G.M.B.H. · Inventors: Kaiser, Fritz; Stach, Kurt K. G.; Schaumann, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
12-Epi-digoxin and derivatives thereof of formula (I): wherein R1 and R2, which may be the same or different are, selected from the group consisting of hydrogen lower acyl radicals and lower alkyl radicals, R3 is a hydrogen atom or a lower acyl radical and R4 is a hydrogen atom or a saturated or unsaturated branched or unbranched aliphatic hydrocarbon radical containing 1 to 4 carbon atoms; the new digoxin derivatives of the invention have a substantially better therapeutic spectrum than the corresponding known digoxin derivatives and are especially well suited for the therapy of cardiac insufficiency.
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
- Granted January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.