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Serving leading biopharmaceutical companies globally:

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Generated: October 23, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,690,825

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Summary for Patent: 4,690,825

Title: Method for delivering an active ingredient by controlled time release utilizing a novel delivery vehicle which can be prepared by a process utilizing the active ingredient as a porogen
Abstract:Delivery vehicles comprised of a polymeric bead having a network of pores with an active ingredient held within the network are provided for use in a method to provide controlled release of the active ingredient. The network of pores is substantially non-collapsible upon removal of the active ingredient and the delivery vehicles are polymerized by a process in which the active ingredient also comprises the porogen during formation of the network of pores.
Inventor(s): Won; Richard (Palo Alto, CA)
Assignee: Advanced Polymer Systems, Inc. (Redwood City, CA)
Application Number:06/784,382
Patent Claim Types:
see list of patent claims
Composition; Delivery; Process; Formulation; Use;

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International Patent Family for Patent: 4,690,825

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia591264► Subscribe
Australia7132287► Subscribe
Germany3774266► Subscribe
European Patent Office0285694► Subscribe
Spain2025570► Subscribe
Austria68965► Subscribe
Greece3003064► Subscribe
JapanS63256126► Subscribe
Japan2680304► Subscribe
South Africa8702665► 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:

US Army
Argus Health
Queensland Health
Johnson and Johnson
Farmers Insurance
US Department of Justice

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