Aralykyl (arylethynyl) aralkyl amines and their use as vasodilators and antihypertensives
CA 1301183 C · Owner: Carson, John R. · Inventors: Carson, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Acetylenes of the formula (I):, (I), wherein Y m, R1, R2, q, Alk, R3, n and R4 are as defined herein and Ar1 and Ar2 are aromatic, including the salts and ammonium derivatives of formula (I) in treating, angina, hypertension and cardiac arrhythmias. Pharmaceutical compositions methods of use and synthesis, and novel intermediates are also part of the invention. One such novel intermediate is represented by the formula (IV), wherein Y, m, R1, R2, R3, R4, X, n Alk, q and Ar2 are as, defined herein.
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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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 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
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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.