4-hydroxy-4-(substituted alkenyl)cyclohexanecarboxylic acids
CA 1296740 C · Owner: Cregge, Robert J. · Inventors: Cregge, Robert J.; Lentz, Nelsen L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compounds which are 4-hydroxy-4-alkenylcyclohexanecarboxylic acid derivatives possessing leukotriene antagonist activity. The compounds are useful in the treatment of allergic diseases particu-, larly in the treatment of human asthma. They are prepared by the reaction of an appropriate oxaspiro compound with a mercaptoalkanoic acid derivative.
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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.