The PTAB is no longer a place where filing more petitions increases your chances.
In Q4 2025, nearly half of all petitions were rejected early, often before the technical arguments were even considered.
At the same time, those who adjusted their approach, better timing, stronger references, and tighter arguments started seeing better outcomes.
This report breaks down what changed and how to adapt.
Key Insights from Q4 2025 PTAB Report
1. Prior Art Strategy Determines Petition Success
Petitions that combined multiple patents with Non-Patent Literature (NPL) achieved the highest institution success rate of 68% and the strongest invalidation outcomes at the Final Written Decision stage.
Single-reference strategies continue to struggle because they rarely disclose every claim limitation.
What this means:
Winning arguments rely on deep technical mapping across patents, standards, and literature, not isolated references.
2. Anticipation Grounds Deliver the Strongest Outcomes
While §103 obviousness accounts for 92% of filings, it shows only moderate institution success.
By contrast, §102 anticipation grounds achieved a 71% institution rate and near-total claim invalidation when successful.
Strategic takeaway:
Finding a single, precise reference can outweigh multiple obviousness combinations.
3. Discretionary Denials Are Now the Biggest Risk
Nearly 46% of petitions were denied, and 58% of those denials resulted from discretionary factors like parallel litigation. Many strong petitions never reached technical review because of procedural timing conflicts with district court trials.
Implication:
Filing timing and litigation coordination now matter as much as prior art strength.
4. Technology Sector Greatly Influences Outcomes
Institution rates vary dramatically by technology domain:
- Semiconductors / Memory: ~72% institution success
- Cloud / Software technologies: ~68%
- Bio-pharma: ~28% institution success due to inherency and enablement hurdles
Lesson:
Prior art density and claim structure shape PTAB success rates.
5. Petition Quality Matters More Than Filing Volume
Petition filings fell by over 40% in Q4, but institution rates recovered as petitioners adapted to denial trends.
The PTAB is increasingly rewarding targeted petitions with strong technical reasoning rather than high-volume filings.
Get the Full Analysis
The complete report includes:
- Detailed prior art success statistics
- Technology-specific IPR outcomes
- Petition and defense strategies used by leading firms
- Claim vulnerability patterns observed across cases
- Litigation timing insights and settlement dynamics
📥 Download the PTAB IPR Trend Report – Q4 2025
