Examiner Seung C. Sohn
Grant ratio: 82.4% (82nd percentile in Art Unit 2878 among examiners with at least 20 applications). Average office actions per grant: 1.18. Most common rejection type: §102.
Potentially inactive
Last office action in data: June 2026
Examiner record
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 20 | 72.5% | 1.59 |
| Group | 351 | 61.2% | 1.71 |
| 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 | 0 | 0.0% |
| 1 OA | 701 | 85.5% |
| 2 OAs | 96 | 11.7% |
| 3 OAs | 19 | 2.3% |
| 4 OAs | 3 | 0.4% |
| 5+ OAs | 1 | 0.1% |
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 | 93 | 68 | 73.1% |
| 2009 | 137 | 123 | 89.8% |
| 2010 | 106 | 100 | 94.3% |
| 2011 | 20 | 16 | 80.0% |
| 2012 | 24 | 21 | 87.5% |
| 2013 | 41 | 34 | 82.9% |
| 2014 | 19 | 16 | 84.2% |
| 2015 | 39 | 33 | 84.6% |
| 2016 | 24 | 21 | 87.5% |
| 2017 | 42 | 41 | 97.6% |
| 2018 | 24 | 17 | 70.8% |
| 2019 | 30 | 28 | 93.3% |
| 2020 | 45 | 39 | 86.7% |
| 2021 | 24 | 22 | 91.7% |
| 2022 | 25 | 21 | 84.0% |
| 2023 | 28 | 25 | 89.3% |
| 2024 | 35 | 33 | 94.3% |
| 2025 | 46 | 18 | 39.1% |
| 2026 | 18 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 820 | 3.7% | 59.4% | 28.4% | 2.6% |
| Action 2 | 119 | 3.4% | 36.1% | 44.5% | 10.1% |
| Action 3 | 23 | 0.0% | 30.4% | 60.9% | 8.7% |
| Action 4 | 4 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 5 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 6 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 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
0.7%
2.0%
0.9%
8.3%
0.0%
4.7%
2014: Alice
3.7%
2.3%
9.1%
8.9%
7.1%
2019: PEG
8.8%
2.0%
12.0%
6.9%
0.0%
2024: AI examples
7.5%
2025: August memo
2.1%
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.