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Generated: December 11, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,011,258

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Summary for Patent: 4,011,258

Title: Orally active bronchospasmolytic compounds
Abstract:Novel compounds are disclosed having useful activity as bronchodilators of improved longevity of action and reduced incidence of side effects. These compounds are described by the formula: ##STR1## wherein R.sub.1 is a member of the class consisting of tertiary butyl and cyclobutyl, and R.sub.2 is a hydrogen or 2 to 5 carbon atom acyl radical, and pharmaceutically acceptable salts thereof. The activity of these compounds is compared to previously known bronchodilators such as 1-(3', 5'-dihydroxyphenyl)-2-(isopropylamino)-ethanol, having the common name orciprenaline, and 1-(3', 4'-dihydroxyphenyl-2-isopropylamino-ethanol, having the common name isoprenaline.
Inventor(s): Wetterlin; Kjell Ingvar Leopold (Sandby, SW), Svensson; Leif Ake (Lund, SW)
Assignee: Aktiebolaget Draco (Lund, SW)
Application Number:05/593,424
Patent Claim Types:
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International Patent Family for Patent: 4,011,258

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria286964► Subscribe
Austria287678► Subscribe
Austria287679► Subscribe
Austria288356► Subscribe
Belgium704932► Subscribe
Switzerland510625► Subscribe
Switzerland510626► Subscribe
Switzerland510627► Subscribe
Switzerland512428► Subscribe
Germany1643296► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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