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Serving leading biopharmaceutical companies globally:

Farmers Insurance
Chinese Patent Office

Generated: December 12, 2017

DrugPatentWatch Database Preview

Details for Patent: 5,725,884

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Summary for Patent: 5,725,884

Title: Pharmaceutical excipient having improved compressibility
Abstract:A microcrystalline cellulose-based excipient having improved compressibility, whether utilized in direct compression, dry granulation or wet granulation formulations, is disclosed. The excipient is an agglomerate of microcrystalline cellulose particles and from about 0.1% to about 20% silicon dioxide particles, by weight of the microcrystalline cellulose, wherein the microcrystalline cellulose and silicon dioxide are in intimate association with each other. The silicon dioxide utilized in the novel excipient has a particle size from about 1 nanometer to about 100 microns. Most preferably, the silicon dioxide is a grade of colloidal silicon dioxide.
Inventor(s): Sherwood; Bob E. (Amenia, NY), Hunter; Edward A. (Glenham, NY), Staniforth; John H. (Bath, GB2)
Assignee: Edward Mendell Co., Inc. (Patterson, NY)
Application Number:08/724,613
Patent Claim Types:
see list of patent claims
Composition; Compound; Dosage form; Use; Formulation; Process;

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International Patent Family for Patent: 5,725,884

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria239450► Subscribe
Austria441403► Subscribe
Austria445391► Subscribe
Australia4759896► Subscribe
Australia5019996► Subscribe
Australia5830399► Subscribe
Australia698667► Subscribe
Australia708346► Subscribe
Australia737464► Subscribe
Brazil9605245► 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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Serving leading biopharmaceutical companies globally:

Daiichi Sankyo
Farmers Insurance
Chinese Patent Office

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