Terbutaline ester derivatives
CA 1210021 A · Owner: Aktiebolaget Draco · Inventors: Svensson, Leif A.; Olsson, Otto A.T.; Wetterlin, Kjell I.L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New bronchospasmolytically active compounds exhibiting long duration:of action and reduced undesired side effects, of the structural formula, and therapeutically acceptable salts thereof in which, formula R, R1 and R2 are as follows: R is selected from the group consisting of -C(CH3)3 R1 is selected from the group consisting of H and R2; R2 is selected from the group consisting of (a) , ( b ) , and, (c), in which formulas R is selected from the group consisting of (a) ll;, (b) , wherein R5 is a straight or branched alkyl group containing 1-4 carbon atoms, and, (c), and wherein R4 is selected from the group consisting of (a) H, (b) an alkyl group containing 1-3 carbon atoms process for the …
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 August 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
- 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.