PTAB Trial Statistics as of June 4, 2015

This page gives Patent Trial and Appeal Board trial figures as of June 4, 2015, which falls in fiscal year 2015 (October 1, 2014 to September 30, 2015). The cumulative figures run from September 16, 2012, when AIA trials began. The full year is covered on the FY2015 statistics page.

Cumulative Figures as of June 4, 2015

Events from September 16, 2012 to June 4, 2015, by trial type:

Measure	IPR	PGR	CBM	DER	Total
Petitions filed	3,008	8	354	8	3,378
Institution decisions: instituted	1,368	0	173	0	1,541
Institution decisions: denied	790	2	90	3	885
Institution rate (by petition)	63.4%	0.0%	65.8%	0.0%	63.5%
Final written decisions	401	0	54	0	455

Terminations without a final written decision	Count
Settlements	343
Adverse judgment	0
Dismissed	0
Other terminations	27

Fiscal Year 2015 to Date

Events from October 1, 2014 to June 4, 2015:

Measure	IPR	PGR	CBM	DER	Total
Petitions filed	1,167	6	121	3	1,297
Institution decisions: instituted	629	0	66	0	695
Institution decisions: denied	437	2	34	0	473
Institution rate (by petition)	59.0%	0.0%	66.0%	—	59.5%
Final written decisions	251	0	37	0	288

Terminations without a final written decision	Count
Settlements	199
Adverse judgment	0
Dismissed	0
Other terminations	19

Change Since May 14, 2015

Between the previous dated page (May 14, 2015) and June 4, 2015, 126 petitions were filed, 53 trials were instituted, 71 petitions were denied institution and 27 final written decisions issued. The cumulative institution rate moved from 64.6% to 63.5%.

Trial Types Covered

3,008 of the 3,378 petitions (89.0%) were for inter partes review, which challenges patent claims on prior-art grounds under 35 U.S.C. chapter 31. The remainder were for covered business method review (354), post-grant review under chapter 32 (8) and derivation proceedings (8). Institution standards differ by proceeding; see the threshold standards.

How These Figures Were Compiled

The figures are counted from USPTO Open Data Portal records retrieved on October 31, 2026, keeping only events dated on or before June 4, 2015: a petition by its filing date, an institution decision by its decision date, and a final written decision or termination by its date. They are a reconstruction from the current records, not the USPTO’s report of that date, and may differ from statistics the USPTO published at the time. Final written decision outcomes are not reported because the records state them for too few decisions. The methodology gives the counting rules in full.

Related Statistics

• PTAB statistics for fiscal year 2015
• PTAB trial statistics as of May 14, 2015 (previous date)
• PTAB trial statistics as of June 30, 2015 (next date)
• PTAB statistics by fiscal year, with charts
• Reading PTAB trial outcomes
• USPTO PTAB statistics (official reports)