Pyrrolo(1,2-a)indole hydroxylamine derivatives as inhibitors of leukotriene biosynthesis
CA 2063955 C · Owner: Merck Frosst Canada & Co./Merck Frosst Canada & Cie · Inventors: Hamel, Pierre; Girard, Yves
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds having the formula I:, <SEE FORMULA I> are inhibitors of leukotriene biosynthesis. These compounds are useful as anti-asthmatic anti-, allergic, anti-inflammatory, and cytoprotective agents. They are also useful in treating angina cerebral spasm, glomerular nephritis, hepatitis endotoxemia, uveitis and allograft rejection and in preventing the formation of athexosclerotic plaques.
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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
- Filed March 25, 1992 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2014.
- 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.