Purinone derivatives as bronchodilators vasodilators and anti-allergic agents
CA 1303037 C · Owner: Coates, William J. · Inventors: Coates, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula (1) : (1), and pharmaceutically acceptable salts thereof are described, wherein R1 is C1-6alkyl or C2-6alkenyl and R2 is hydrogen or hydroxy. These compounds have vasodilator bronchodilator and, anti-allergic properties. Pharmaceutical compositions are described as are methods of use. Processes for the preparation of the compounds of the formula (1) are described.
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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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.