Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Tablets – lozenges – or pills
Reexamination Certificate
2003-12-23
2008-10-28
Richter, Johann (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Tablets, lozenges, or pills
C424S464000, C424S469000, C424S482000, C424S486000, C424S647000, C514S502000
Reexamination Certificate
active
07442387
ABSTRACT:
The present invention pertains to a sized product, which contains a drug, polyethylene oxide with a molecular weight of 2,000,000 or higher, and a specific size controlling agent for polyethylene oxide (substance with the appropriate plasticity and binding force) and wherein at least the above-mentioned specific size controlling agent is uniformly dispersed in the above-mentioned polyethylene oxide, a controlled-release pharmaceutical composition containing this sized product, and a method of manufacturing a controlled-release pharmaceutical composition containing this sized product.A controlled-release pharmaceutical composition with good uniformity of content can be presented by using powder particles of polyethtylene oxide with powder properties suitable for tableting, which is obtained by uniform dispersion of the specific size controlling agent for polyethylene oxide of the present invention.
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Taiwan Patent Office; Search Report.
Sako Kazuhiro
Sawada Toyohiro
Sugihara Akio
Arnold Ernst
Astellas Pharma Inc.
Richter Johann
Townsend and Townsend / and Crew LLP
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