Polycyclic quinoline, naphthyridine and pyrazinopyridine derivatives
CA 1306255 C · Owner: Friary, Richard James · Inventors: Siegel, Marvin Ira; Schwerdt, John Herbert; Smith, Sidney R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polycyclic quinoline naphthyridine and, pyrazinopyridine derivatives are disclosed which are useful for treatinq allergic reactions inflammation, peptic ulcers, hypertension and hyperproliferative skin, diseases and for suppressing the immune response in mammals. Methods for preparing said compounds are also disclosed. P/PASP0591
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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 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.