Details for Patent: 4,652,441

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Summary for Patent: 4,652,441

Title:	Prolonged release microcapsule and its production
Abstract:	A microcapsule produced by preparing a water-in-oil emulsion comprising an inner aqueous layer containing said water-soluble drug and a drug retaining substance therefor and an oil layer containing a polymer substance, then thickening or solidifying said inner aqueous layer to a viscosity of not lower than about 5000 centiposes and finally subjecting the resulting emulsion to in water drying gives prolonged release of water-soluble drug.
Inventor(s):	Okada; Hiroaki (Suita, JP), Ogawa; Yasuaki (Ibaraki, JP), Yashiki; Takatsuka (Takarazuka, JP)
Assignee:	Takeda Chemical Industries, Ltd. (Osaka, JP)
Application Number:	06/667,096
Patent Claim Types: see list of patent claims	Compound; Dosage form; Use;

Drugs Protected by US Patent 4,652,441

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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: 4,652,441

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
Japan	58-207760	Nov 04, 1983

International Family Members for US Patent 4,652,441

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Austria	42197	⤷ Sign Up
Bulgaria	60493	⤷ Sign Up
Canada	1233414	⤷ Sign Up
Germany	3477732	⤷ Sign Up
European Patent Office	0145240	⤷ Sign Up
Spain	537325	⤷ Sign Up
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