发明名称 |
LAYERED TABLET FOR THE CONTROLLED RELEASE OF ACTIVE SUBSTANCES |
摘要 |
The invention concerns a layered tablet for the controlled release of active substances in a liquid medium with at least one layered matrix which contains active substance and comprises contact surfaces for contact with the liquid medium. The contact surfaces of the matrix comprise at least partially a cover layer which delays or prevents the release of active substances. The invention is characterized in that the cover layer is at least one additional layer applied to contact surfaces of the layered prefabricated matrix or the matrix is at least one additional layer applied to contact surfaces of the layered prefabricated cover layer, the additional layer being applied by pressing powdered or granulated material in graded thicknesses onto the layered prefabricated matrix or the layered prefabricated cover layer.
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申请公布号 |
CA2226147(A1) |
申请公布日期 |
1997.01.30 |
申请号 |
CA19962226147 |
申请日期 |
1996.06.24 |
申请人 |
LTS LOHMANN THERAPIE-SYSTEME GMBH;LTS LOHMANN THERAPIE-SYSTEME GMBH |
发明人 |
CREMER, KARSTEN |
分类号 |
A61J3/10;A61K9/24;(IPC1-7):A61K9/24 |
主分类号 |
A61J3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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