Expired Canadian patentCanada
2-substituted quinolines
CA 1338352 C · Owner: Frenette, Richard · Inventors: Young, Robert N.; Leger, Serge; Williams, Haydn W.R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds having the formula:, are selective antagonists of leukotrienes of D4. These compounds are useful as anti-asthmatic anti-allergic, anti-inflammatory, and cytoprotective agents.
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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 28, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 18, 1986
GrantedMay 28, 1996
Term endedMay 28, 2013
Patent numberCA 1338352 C
Classification (IPC)C07D215/02 +2 more
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.