Imidazoline compounds
CA 2303385 A1 · Owner: Miura, Masataka · Inventors: Aizawa, Hideyuki; Miura, Masataka; Ohno, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The imidazoline compound represented by structural formula (I) or pharmacologically acceptable salts thereof and the imidazoline compound , represented by structural formula (II). The compound (I) has a highly selective antagonistic activity against muscarine M3 receptors particularly , against muscarine M3 receptors of the respiratory tract and hence is useful , particularly as a preventive or therapeutic agent for diseases wherein muscarine M3 receptors participate, particularly chronic obstructive pulmonary disease and asthma. The compound (II) is useful as an intermediate for the preparation of the compound (I).
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
- Filed September 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2020.
- 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.