Examiner Dustin T Nguyen
Grant ratio: 60.7% (15th percentile in Art Unit 3745 among examiners with at least 20 applications). Average office actions per grant: 1.81. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 91557
- Primary art unit
- 3745
- Work group
- 3740
- Technology center
- 3700
- Applications
- 521
- Granted applications
- 316
- Examiner phone
- (571) 270-0163
- Supervisor
- Nathaniel E. Wiehe
- Supervisor phone
- (571) 272-8648
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 | 95 | 67.5% | 1.62 |
| Group | 444 | 57.6% | 1.86 |
| Tech Center | 2,671 | 48.4% | 2.01 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 2 | 0.4% |
| 1 OA | 268 | 51.4% |
| 2 OAs | 164 | 31.5% |
| 3 OAs | 49 | 9.4% |
| 4 OAs | 24 | 4.6% |
| 5+ OAs | 14 | 2.7% |
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 |
|---|---|---|---|
| 2014 | 9 | 7 | 77.8% |
| 2015 | 45 | 30 | 66.7% |
| 2016 | 50 | 31 | 62.0% |
| 2017 | 51 | 36 | 70.6% |
| 2018 | 24 | 17 | 70.8% |
| 2019 | 37 | 23 | 62.2% |
| 2020 | 38 | 25 | 65.8% |
| 2021 | 28 | 21 | 75.0% |
| 2022 | 44 | 34 | 77.3% |
| 2023 | 46 | 36 | 78.3% |
| 2024 | 37 | 29 | 78.4% |
| 2025 | 51 | 27 | 52.9% |
| 2026 | 61 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 519 | 1.2% | 11.4% | 61.7% | 24.3% |
| Action 2 | 251 | 0.8% | 9.6% | 66.1% | 22.7% |
| Action 3 | 87 | 0.0% | 3.4% | 80.5% | 14.9% |
| Action 4 | 38 | 0.0% | 10.5% | 76.3% | 13.2% |
| Action 5 | 14 | 0.0% | 7.1% | 71.4% | 21.4% |
| Action 6 | 6 | 0.0% | 16.7% | 83.3% | 16.7% |
| Action 7 | 3 | 0.0% | 33.3% | 33.3% | 33.3% |
| Action 8 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 9 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 10 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-08-28–2026-08-28. All years includes every dated office action in the data.
By year
2014: Alice
5.3%
0.0%
0.0%
1.2%
2.2%
2019: PEG
0.0%
0.0%
0.0%
1.5%
1.2%
2024: AI examples
1.3%
2025: August memo
1.2%
1.3%
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.