Examiner Mark Prenty
Grant ratio: 88.4% (95th percentile in Art Unit 2814 among examiners with at least 20 applications). Average office actions per grant: 1.84. Most common rejection type: §102.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 64167
- Primary art unit
- 2814
- Work group
- 2820
- Technology center
- 2800
- Applications
- 742
- Granted applications
- 656
- Examiner phone
- (571) 270-7639
Save this analysis
Download this examiner report.
Log in / Sign Up to exportPeer comparisons
| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 36 | 59.1% | 1.77 |
| Group | 207 | 71.2% | 1.64 |
| Tech Center | 2,413 | 62.4% | 1.69 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 5 | 0.7% |
| 1 OA | 392 | 52.8% |
| 2 OAs | 212 | 28.6% |
| 3 OAs | 70 | 9.4% |
| 4 OAs | 29 | 3.9% |
| 5+ OAs | 34 | 4.6% |
Each application is counted once. “5+” includes all higher counts.
Grant history
Recent ratios may be lower while applications remain pending.
Yearly counts
| Year | Applications | Grants | Grant rate |
|---|---|---|---|
| 2008 | 55 | 46 | 83.6% |
| 2009 | 74 | 61 | 82.4% |
| 2010 | 57 | 49 | 86.0% |
| 2011 | 38 | 33 | 86.8% |
| 2012 | 27 | 27 | 100.0% |
| 2013 | 40 | 34 | 85.0% |
| 2014 | 26 | 22 | 84.6% |
| 2015 | 42 | 37 | 88.1% |
| 2016 | 60 | 55 | 91.7% |
| 2017 | 41 | 36 | 87.8% |
| 2018 | 42 | 41 | 97.6% |
| 2019 | 55 | 55 | 100.0% |
| 2020 | 34 | 34 | 100.0% |
| 2021 | 29 | 29 | 100.0% |
| 2022 | 38 | 38 | 100.0% |
| 2023 | 22 | 21 | 95.5% |
| 2024 | 25 | 24 | 96.0% |
| 2025 | 20 | 14 | 70.0% |
| 2026 | 17 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 737 | 1.5% | 44.5% | 35.0% | 11.0% |
| Action 2 | 345 | 0.3% | 34.5% | 36.5% | 22.0% |
| Action 3 | 133 | 0.8% | 35.3% | 42.9% | 16.5% |
| Action 4 | 63 | 0.0% | 22.2% | 46.0% | 25.4% |
| Action 5 | 34 | 0.0% | 23.5% | 55.9% | 17.6% |
| Action 6 | 16 | 0.0% | 31.3% | 56.3% | 6.3% |
| Action 7 | 9 | 0.0% | 11.1% | 77.8% | 11.1% |
| Action 8 | 4 | 0.0% | 25.0% | 50.0% | 25.0% |
| Action 9 | 4 | 0.0% | 0.0% | 50.0% | 50.0% |
| Action 10 | 2 | 0.0% | 0.0% | 0.0% | 100.0% |
Section 101 rejections
Last 3 years: 2023-08-28–2026-08-28. All years includes every dated office action in the data.
By year
0.0%
0.8%
1.4%
1.0%
1.4%
0.0%
1.4%
2014: Alice
0.0%
0.0%
0.0%
1.3%
1.5%
2019: PEG
1.1%
0.0%
1.9%
1.5%
0.0%
2024: AI examples
3.1%
2025: August memo
3.8%
0.0%
Each bar is the percentage of office actions with a §101 rejection.
PTAB appeals
No PTAB decisions could be matched to this examiner.
Older and transferred applications may not have a reliable examiner match. Data through Aug. 27, 2026.