Once filed, the requester cannot “unfile” the reexamination. Many pitfalls await the unwary. Learn More

How to institute a reexamination, common pitfalls, ex parte versus inter partes. Learn More

Most recent USPTO reexamination statistics regarding volume and timing from 2007-2010. Learn More

Concise definitions and discussions of important reexamination concepts and terminology. Learn More

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Litigation Stays

Judge Selna in the Central District of California has authored a number of nuanced stay decisions.

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Executive Interviews

The Reexamination Center Executive Interview: Dr. Nancy J. Linck

The Reexamination Center interviews Nancy J. Linck, Ph.D. on a variety of post-grant challenge options at the PTO, including inter partes and ex partes reexamination and the new options introduced within the America Invents Act signed into law in September 2011.

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Quick Stat

10,782

Total number of ex parte requests filed since July 01, 1981.

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Reexamination News & Events

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May 11, 2012

Biotechnology (Combination Immediate Release Controlled Release Levodopa/Carbidopa Dosage Forms) Reexam Request – May 11, 2012

Biotechnology (Combination Immediate Release Controlled Release Levodopa/Carbidopa Dosage Forms) related Ex Parte Reexamination of United States Patent No. 7,094,427 to Han et al. is requested on May 11, 2012.

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May 10, 2012

Daily Reexamination Report – May 10, 2012

Below is the newest reexamination request filed with the United States Patent and Trademark Office as of May 10, 2012: four ex parte reexamination requests.

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May 9, 2012

Daily Reexamination Report – May 9, 2012

Below is the newest reexamination request filed with the United States Patent and Trademark Office as of May 9, 2012: four ex parte reexamination requests and one inter partes reexamination request.

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