Berban derivatives as a -adrenergic antagonists
CA 1294964 C · Owner: Marton, Jeno · Inventors: Gaal, Jozsef; Toth, Istvan; Marton, Jeno
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel racemic or optioally active berban derivatives of the general formula (I), wherein, R1 and R2 represent independently from the other a hydroxyl, straight or branched chain alkoxy group having 1 to 6 carbon atorns or R1 and R2 together represent a C1-3 alkylenedioxy group;, R3 and R4 represent independently from the other hydrogen, straight or branched chain, alkyl group having 1 to 4 oarbon atoms, and optionally substituted by hydroxyl group, or a C2-6 alkoxycarbonyl or, cyano group; and R5 represents hydrogen, straight or branched chain alkyl group having 1 to 6 carbon atoms, C1-7 aliphatic or aromatic acyl group or C1-7 alkylsulphonyl or aryl-, sulphonyl …
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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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.