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Details for Patent: 5,631,020

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Summary for Patent: 5,631,020

Title: Method for producing microcapsule
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 (Osaka, JP), Ogawa; Yasuaki (Osaka, JP), Yashiki; Takatsuka (Hyogo, JP)
Assignee: Takeda Chemical Industries, Ltd. (Osaka, JP)
Application Number:08/468,657
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent PDF download available with subscription

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Foreign Priority and PCT Information for Patent: 5,631,020

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan58-207760Nov 04, 1983

International Patent Family for Patent: 5,631,020

Country Document Number Publication Date Supplementary Protection Certificate SPC Country SPC Expiration
HungaryT37037Nov 28, 1985
Hungary193910Dec 28, 1987
Ireland842830May 04, 1985
JapanH0157087Dec 04, 1989
Austria42197May 15, 1989
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Preferred citation:

Friedman, Y. Location of pharmaceutical innovation: 2000–2009 Nature Reviews Drug Discovery 9, 835–836 (2010).

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