PTAB Trial Statistics as of April 30, 2015

This page gives Patent Trial and Appeal Board trial figures as of April 30, 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 April 30, 2015

Events from September 16, 2012 to April 30, 2015, by trial type:

Measure	IPR	PGR	CBM	DER	Total
Petitions filed	2,833	5	327	8	3,173
Institution decisions: instituted	1,302	0	159	0	1,461
Institution decisions: denied	700	2	86	3	791
Institution rate (by petition)	65.0%	0.0%	64.9%	0.0%	64.9%
Final written decisions	360	0	50	0	410

Terminations without a final written decision	Count
Settlements	319
Adverse judgment	0
Dismissed	0
Other terminations	25

Fiscal Year 2015 to Date

Events from October 1, 2014 to April 30, 2015:

Measure	IPR	PGR	CBM	DER	Total
Petitions filed	992	3	94	3	1,092
Institution decisions: instituted	563	0	52	0	615
Institution decisions: denied	347	2	30	0	379
Institution rate (by petition)	61.9%	0.0%	63.4%	—	61.9%
Final written decisions	210	0	33	0	243

Terminations without a final written decision	Count
Settlements	175
Adverse judgment	0
Dismissed	0
Other terminations	17

Change Since April 9, 2015

Between the previous dated page (April 9, 2015) and April 30, 2015, 108 petitions were filed, 67 trials were instituted, 52 petitions were denied institution and 21 final written decisions issued. The cumulative institution rate moved from 65.4% to 64.9%.

Trial Types Covered

2,833 of the 3,173 petitions (89.3%) 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 (327), post-grant review under chapter 32 (5) 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 April 30, 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 April 9, 2015 (previous date)
• PTAB trial statistics as of May 14, 2015 (next date)
• PTAB statistics by fiscal year, with charts
• Reading PTAB trial outcomes
• USPTO PTAB statistics (official reports)