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Serving leading biopharmaceutical companies globally:

Cantor Fitzgerald
Harvard Business School
Johnson and Johnson
Fish and Richardson
Queensland Health

Generated: December 11, 2017

DrugPatentWatch Database Preview

Details for Patent: 3,883,545

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Summary for Patent: 3,883,545

Abstract:New 1-hydroxy-2-pyridones of the general formula ##SPC1## In which R.sub.1 is alkyl of 1 to 17 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, cyclohexylalkyl or phenalkyl both having 1 to 3 carbon atoms in the alkylene chain or .alpha.-furyl, all of which may be substituted by halogen and R.sub.2 to R.sub.4 are hydrogen or lower alkyl or 2 adjacent substituents together form a trimethylene or tetramethylene chain, and in which R.sub.1 to R.sub.4 together contain at least 2 carbon atoms, are prepared by contacting unsaturated .delta.-keto esters or mixtures thereof with hydroxylamine and subjecting the products to cyclization. The compounds exhibit antimycotic properties.
Inventor(s): Lohaus; Gerhard (Kelkheim/Taunus, DT), Dittmar; Walter (Hofheim/Taunus, DT)
Assignee: Hoechst Aktiengesellschaft (Frankfurt am Main, DT)
Application Number:05/317,387
Patent Claim Types:
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Foreign Priority and PCT Information for Patent: 3,883,545

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
1795270Aug 31, 1968

International Patent Family for Patent: 3,883,545

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria291260► Subscribe
Belgium738288► Subscribe
Brazil6911968► Subscribe
Switzerland547284► Subscribe
Czechoslovakia150278► Subscribe
Cyprus699► Subscribe
Germany1795270► Subscribe
Denmark125091► Subscribe
Spain371031► Subscribe
Finland50334► 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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Serving leading biopharmaceutical companies globally:

Express Scripts
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