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Details for Patent: 4,933,360
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See Plans and PricingSummary 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 |
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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 |
