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Serving leading biopharmaceutical companies globally:

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Generated: December 13, 2017

DrugPatentWatch Database Preview

Details for Patent: 6,110,503

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Summary for Patent: 6,110,503

Title: Preparation of biodegradable, biocompatible microparticles containing a biologically active agent
Abstract:A method for preparing biodegradable, biocompatible microparticles. A first phase is prepared that includes a biodegradable, biocompatible polymer, an active agent, and a solvent. An immiscible second phase is prepared. The first and second phases are combined to form an emulsion in which the first phase is discontinuous and the second phase is continuous. The two phases are immersed in a quench liquid that includes a quench medium and a quantity of the solvent. The quantity of the solvent is selected to control a rate of extraction of the solvent from the first phase. The first phase is isolated in the form of microparticles. Also disclosed is a microencapsulated active agent prepared by the method for preparing biodegradable, biocompatible microparticles.
Inventor(s): Rickey; Michael E. (Loveland, OH), Ramstack; J. Michael (Lebanon, OH), Lewis; Danny H. (Hartselle, AL)
Assignee: Alkermes Controlled Therapeutics Inc. (Cambridge, MA)
Application Number:09/263,098
Patent Claim Types:
see list of patent claims
Use; Process; Formulation;

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International Patent Family for Patent: 6,110,503

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Turkey9802258► Subscribe
Slovakia283852► Subscribe
Slovakia154198► Subscribe
Slovenia1210942► Subscribe
Slovenia904063► Subscribe
Russian Federation2201214► Subscribe
Portugal1210942► Subscribe
Portugal904063► Subscribe
Poland188550► Subscribe
Poland329720► 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:

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