Dihydropyridines
CA 1278573 C · Owner: Alker, David · Inventors: Alker, David; Campbell, Simon Fraser; Cross, Peter Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: "Dihydropyridines", Compounds of the formula:- ----(I), where R is an optionally substituted aryl or heteroaryl group; R1 and R2 are each independently C1-C4 alkyl or 2-methoxyethyl; and Y is -(CH2)n- where n is 2 3 or 4, -CH2CH(CH3)- or -CH2C(CH3)2-;, and their pharmaceutically acceptable salts. The compounds have utility as anti-ischaemic ant antihypertensive agents and as synthetic intermediates to other dihydropyridine calcium antagonists.
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 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2008.
- 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.