Dibenzoheterocyclic hydroxamic acids and hydroxy ureas as inhibitors of 5-lipoxygenase
CA 2012137 C · Owner: Merck Frosst Canada & Co./Merck Frosst Canada & Cie · Inventors: Girard, Yves; Delorme, Daniel; Hamel, Pierre
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 the 5-lipoxygenase enzyme. These compounds are useful as anti-asthmatic anti-allergic, anti-inflammatory, and cytoprotective agents. They are also useful in treating diarrhea hypertension, angina, platelet aggregation cerebral, spasm, premature labor, spontaneous abortion dysmenorrhea, and migraine.
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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 14, 1990 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2012.
- 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
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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.