Last Updated: May 11, 2026

Details for Patent: RE34672

Name: Drug Patent Intelligence for US Patent RE34672
Creator: DrugPatentWatch
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Summary for Patent: RE34672

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 P21/c, melting point 162 DEG C.) from torasemide of modification II (monoclinic, space group P2/n, melting point 169 DEG 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):	Fritz Topfmeier, Gustav Lettenbauer
Assignee:	Roche Diagnostics GmbH
Application Number:	US08/043,631
Patent Claim Types: see list of patent claims	Use; Composition; Dosage form;

Drugs Protected by US Patent RE34672

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

Foreign Priority and PCT Information for Patent: RE34672

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Germany	3529529	Aug 17, 1985

International Family Members for US Patent RE34672

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	49196	⤷ Start Trial
Australia	573454	⤷ Start Trial
Australia	6105586	⤷ Start Trial
Canada	1307277	⤷ Start Trial
Czechoslovakia	259891	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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