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Last Updated: February 19, 2020

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Details for Patent: 4,933,360


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Summary for Patent: 4,933,360
Title: Novel chlorthalidone process and product
Abstract:Water-soluble dispersions of chlorthalidone are prepared by a process comprising: (a) forming a solution comprising a water soluble pharmaceutically acceptable polymeric carrier and a C.sub.1 -C.sub.4 alkanol, (b) dissolving chlorthalidone in the solution thus formed, and (c) removing the C.sub.1 -C.sub.4 alkanol from the solution by evaporation, the amount of said carrier being effective to suppress substantially the formation of the alkyl ether by-product from the reaction of chlorthalidone with the C.sub.1 -C.sub.4 alkanol. A preferred water soluble carrier is polyvinylpyrrolidone and a preferred C.sub.1 -C.sub.4 alkanol is methanol.
Inventor(s): Pandit; Nivedita (Middlebury, CT), Horhota; Stephen T. (Brookfield, CT)
Assignee: Boehringer Ingelheim Pharmaceuticals, Inc. (Ridgefield, CT)
Application Number:06/796,467
Patent Claim Types:
see list of patent claims
Process; Formulation; Composition; Dosage form; Use;

Drugs Protected by US Patent 4,933,360

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

International Family Members for US Patent 4,933,360

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 31024   Start Trial
Australia 2569684   Start Trial
Australia 562929   Start Trial
Canada 1212329   Start Trial
German Democratic Republic 220225   Start Trial
Germany 3467707   Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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