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

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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
Japan	4-274979	Sep 18, 1992
Japan	5-165263	Jun 08, 1993

International Family Members for US Patent 6,699,503

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Austria	219933	⤷ Sign Up
Australia	4983893	⤷ Sign Up
Australia	682827	⤷ Sign Up
Bulgaria	61861	⤷ Sign Up
Bulgaria	99503	⤷ Sign Up
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