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Serving hundreds of leading biopharmaceutical companies globally:

AstraZeneca
Queensland Health
Daiichi Sankyo
Johnson and Johnson
Merck
Citi
Chinese Patent Office
Baxter
Argus Health

Generated: June 19, 2018

DrugPatentWatch Database Preview

Details for Patent: 5,541,171

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Summary for Patent: 5,541,171
Title: Orally administrable pharmaceutical composition
Abstract:A solid dosage form, such as a capsule or tablet, containing a pharmacologically active agent is coated with an anionic polymer, which is insoluble in gastric juice and in intestinal juice below pH7 but soluble in colonic intestinal juice, in a sufficient amount that the oral dosage form remains intact until it reaches the colon. The preferred anionic polymer is a partly methyl esterified methacrylic acid polymer in which the ratio of free carboxylic groups to ester groups is about 1:2. The invention has particular application to dosage forms of prednisolone and salts thereof, indomethacin, ibuprofen, and, especially, 5-amino-salicylic acid.
Inventor(s): Rhodes; John (Cardiff, GB7), Evans; Brian K. (Dinas Powis, GB7)
Assignee: Tillotts Pharma AG (Ziefen, CH)
Application Number:08/448,300
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 5,541,171
Patent Claim Types:
see list of patent claims
Use; Composition; Compound; Dosage form;

Drugs Protected by US Patent 5,541,171

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

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Foreign Priority and PCT Information for Patent: 5,541,171

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom8123573Jul 31, 1981

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Serving hundreds of leading biopharmaceutical companies globally:

US Army
Dow
Covington
Fuji
UBS
Chubb
Boehringer Ingelheim
Mallinckrodt
Cerilliant

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