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Details for Patent: 7,223,440

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Patent 7,223,440 protects BYDUREON and BYDUREON PEN and is included in one NDA.

This patent has nineteen patent family members in fourteen countries.

Summary for Patent: 7,223,440

Title:Residual solvent extraction method and microparticles produced thereby
Abstract: Methods for preparing microparticles having reduced residual solvent levels. Microparticles are contacted with a non-aqueous washing system to reduce the level of residual solvent in the microparticles. Preferred non-aqueous washing systems include 100% ethanol and a blend of ethanol and heptane. A solvent blend of a hardening solvent and a washing solvent can be used to harden and wash microparticles in a single step, thereby eliminating the need for a post-hardening wash step.
Inventor(s): Rickey; Michael E. (Loveland, OH), Ramstack; J. Michael (Lunenburg, MA), Kumar; Rajesh (Marlborough, MA)
Assignee: Alkermes, Inc. (Cambridge, MA)
Application Number:11/312,371
Patent Claim Types:
see list of patent claims
Formulation; Process; Use;
Patent Metrics:
Source: PatentQuant.com
Field: Chemical engineering
Back Citations: 48th percentile
Forward Citations: 3rd percentile

Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use
Astrazeneca Ab
BYDUREON
exenatide synthetic
FOR SUSPENSION, EXTENDED RELEASE;SUBCUTANEOUS022200-001Jan 27, 2012RXYes7,223,440► subscribeY
Astrazeneca Ab
BYDUREON PEN
exenatide synthetic
FOR SUSPENSION, EXTENDED RELEASE;SUBCUTANEOUS022200-002Feb 28, 2014RXYes7,223,440► subscribeY
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Non-Orange Book Patents for Patent: 7,223,440

For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.

The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.

Patent No. Title Estimated Patent Expiration
8,187,672Residual solvent extraction method and microparticles produced thereby► subscribe
6,824,822 Residual solvent extraction method and microparticles produced thereby► subscribe
7,524,530Residual solvent extraction method and microparticles produced thereby► subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Because of the complexity of determining patent expiration dates it is advisable to have patent counsel verify freedom to operate.

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International Patent Family for Patent: 7,223,440

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria501711► subscribe
Canada2454027► subscribe
Cyprus1112348► 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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