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Details for Patent: 5,827,529

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Summary for Patent: 5,827,529

Title: External preparation for application to the skin containing lidocaine
Abstract:An external preparation for application to the skin containing lidocaine which comprises a drug-retaining layer placed on a support, wherein said drug-retaining layer comprises an adhesive gel base and 1 to 10% by weight of lidocaine, said base comprising a water-soluble high molecular weight substance, water and a water-retaining agent, which can release the active lidocaine gradually and constantly so that lidocaine is transdermally absorbed for a long period of time.
Inventor(s): Ono; Masahiro (Kagawa-ken, JP), Akazawa; Mitsuji (Kagawa-ken, JP), Seki; Michiko (Kagawa-ken, JP), Iwamoto; Kiyomi (Kagawa-ken, JP), Konishi; Ryoji (Kagawa-ken, JP)
Assignee: Teikoku Seiyaku Kabushiki Kaisha (Kagawa-Ken, JP)
Application Number:08/258,378
Patent Claim Types:
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Compound; Composition;

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Foreign Priority and PCT Information for Patent: 5,827,529

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan3-067353Mar 30, 1991

International Patent Family for Patent: 5,827,529

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria149351► Subscribe
Canada2064325► Subscribe
Germany69217685► Subscribe
European Patent Office0507160► Subscribe
Spain2100970► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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