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Details for Patent: 4,822,807

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Summary for Patent: 4,822,807

Title: Pharmaceutical composition containing a stable modification of torasemide
Abstract:The present invention provides a process for the preparation of cystalline torasemide in the pure modification I (monoclinic, space group P2.sub.1 /c, melting point 162.degree. C.) from torasemide of modification II (monoclinic, space group P2/n, melting point 169.degree. C.), wherein a suspension of torasemide of modification II is stirred in water with the addition of a catalytic amount of modification I until the rearrangement is complete. The present invention also provides pharmaceutical compositions containing torasemide of modification I.
Inventor(s): Topfmeier; Fritz (Heidelberg, DE), Lettenbauer; Gustav (Lampertheim, DE)
Assignee: Boehringer Mannheim GmbH (Mannheim, DE)
Application Number:07/111,439
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Foreign Priority and PCT Information for Patent: 4,822,807

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany3529529Aug 17, 1985

International Patent Family for Patent: 4,822,807

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria49196► subscribe
Australia573454► subscribe
Australia6105586► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
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