Details for Patent: 4,933,360

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

International Family Members for US Patent 4,933,360

Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Austria	31024
Australia	2569684
Australia	562929
Canada	1212329
German Democratic Republic	220225
Germany	3467707
Denmark	156784