CN Patent

CN102670549A — 盐酸罗匹尼罗渗透泵型控释片

Assigned to Beijing Tianheng Hospital Management Co. Ltd. · Expires 2012-09-19 · 14y expired

What this patent protects

本发明提供了一种新型盐酸罗匹尼罗渗透泵型控释片，采用乙基纤维素和聚维酮作为半透膜成膜材料，优选具有不对称的片型，可以克服半透膜老化现象，降低药物残留。本发明还提供了一种改善盐酸罗匹尼罗渗透泵型控释片抗老化性能的方法，其特征是采用乙基纤维素-聚维酮作为半透膜材料。此外，本发明还提供了乙基纤维素-聚维酮组合物用于制备具有抗老化性能的盐酸罗匹尼罗渗透泵型控释片的用途。

USPTO Abstract

本发明提供了一种新型盐酸罗匹尼罗渗透泵型控释片，采用乙基纤维素和聚维酮作为半透膜成膜材料，优选具有不对称的片型，可以克服半透膜老化现象，降低药物残留。本发明还提供了一种改善盐酸罗匹尼罗渗透泵型控释片抗老化性能的方法，其特征是采用乙基纤维素-聚维酮作为半透膜材料。此外，本发明还提供了乙基纤维素-聚维酮组合物用于制备具有抗老化性能的盐酸罗匹尼罗渗透泵型控释片的用途。

Drugs covered by this patent

amantadine-hydrochloride (AMANTADINE HYDROCHLORIDE)

Patent Metadata

Patent number: CN102670549A
Jurisdiction: CN
Classification: —
Expires: 2012-09-19
Drug substance claim: No
Drug product claim: No
Assignee: Beijing Tianheng Hospital Management Co. Ltd.
Source: FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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