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Last Updated: March 28, 2024

Details for Patent: 6,699,503


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Summary for Patent: 6,699,503
Title: Hydrogel-forming sustained-release preparation
Abstract:The invention provides a hydrogen-type sustained-release preparation comprising (1) at least one drug, (2) an additive which insures a penetration of water into the core of the preparation and (3) a hydrogen-forming polymer, wherein said preparation is capable of undergoing substantially complete gelation during its stay in the upper digestive tract such as stomach and small intestine and is capable of releasing the drug in the lower digestive tract including colon. By the preparation of the invention, the drug is efficiently released and absorbed even in the colon so that a steady and sustained release effect can be achieved.
Inventor(s): Sako; Kazuhiro (Shizuoka, JP), Nakashima; Hiroshi (Shizuoka, JP), Sawada; Toyohiro (Shizuoka, JP), Okada; Akira (Shizuoka, JP), Fukui; Muneo (Shizuoka, JP)
Assignee: Yamanuchi Pharmaceutical Co., Ltd. (Tokyo, JP)
Application Number:09/702,880
Patent Claim Types:
see list of patent claims
Compound;

Drugs Protected by US Patent 6,699,503

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: 6,699,503

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan4-274979Sep 18, 1992
Japan5-165263Jun 08, 1993

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