Dihydropyridine derivatives as bradykinin antagonists
CA 2198231 C · Owner: Lowe, John A. Iii · Inventors: Vinick, Fredric J.; Ito, Fumitaka; Kondo, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula (I) and its pharmaceutically acceptable salts wherein , A1 and A2 are each halo; X is direct bond CH2, CO, O, S, S(O) or S(O)2; R1 is , selected from a variety of groups such as hydrogen; substituted or unsubstituted C1-4 alkyl; substituted or unsubstituted piperidinyl; substituted or unsubstituted C5-14 cycloalkyl bicycloalkyl or tricycloalkyl; , substituted or unsubstituted C7-14 azacycloazabicyclo- or azatricyclo-, alkyl; bicyclo C7-10 alkenyl; benzocyclo C5-7 alkyl; and heterocyclic; R2 is hydrogen, C1-4 alkyl, substituted or unsubstituted phenyl or heterocyclic; and R3 and R4 are each C1-5 alkyl. The novel dihydropyridine compounds of this invention have …
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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
- Filed May 26, 1995 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2017.
- 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
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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.