>Institute for Progess found that actual pendencies for inter partes reexaminations are closer to 43.5 months, and may be high as 97 months (!) (http://271patent.blogspot.com/2008/05/another-critical-study-on-inter-partes.html">link).

Requester success rates are now higher than ever - only 5% of challenged patents emerge with all claims confirmed. 35% of challenged patents emerge with claim changes, and 60% of challenged patents have all claims canceled or disclaimed. In December 2008, 9% of the challenged patents had all claims confirmed, with 21% having claim changes and 70% having all claims canceled or disclaimed.