Antiarrhythmic agents
CA 1295616 C · Owner: Arrowsmith, John E. · Inventors: Thomas, Geoffrey N.; Arrowsmith, John E.; Cross, Peter E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
9387-95, Abstract, Title: Antiarrhyehmic Agents Antiarrhythmic agents of the formula:- --- (I), and their pharmaceutically acceptable salts wherein R is a C1-C4 alkyl group;, R1 is a C1-C4 alkyl group; X is -CH2-, -CO- or -CH(OH)-;, n is 2, 3 or 4; and "Het" is a 5- or 6-membered nitrogen-containing heterocyclic group which is attached to the adjacent carbon atom by a carbon or nitrogen atom and optionally contains a further heteroatom selected from O and N said 5- or 6-membered nitrogen-containing heterocyclic group being either (i) substituted by a phenyl or benzyl group or (ii) fused at two adjacent carbon atoms to a benzene ring, said benzene ring being optionally substituted by 1 or 2 …
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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.