Examiner Sangseok Park
Grant ratio: 70.6% (75th percentile in Art Unit 2499 among examiners with at least 20 applications). Average office actions per grant: 1.84. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 94711
- Primary art unit
- 2499
- Work group
- 2490
- Technology center
- 2400
- Applications
- 265
- Granted applications
- 187
- Examiner phone
- (571) 272-4332
- Supervisor
- Philip Chea
- Supervisor phone
- (571) 272-3951
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 9 | 59.5% | 1.62 |
| Group | 198 | 61.4% | 2.06 |
| Tech Center | 1,754 | 58.4% | 2.14 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 2 | 0.8% |
| 1 OA | 146 | 55.1% |
| 2 OAs | 68 | 25.7% |
| 3 OAs | 31 | 11.7% |
| 4 OAs | 12 | 4.5% |
| 5+ OAs | 6 | 2.3% |
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 |
|---|---|---|---|
| 2019 | 1 | 0 | 0.0% |
| 2020 | 29 | 22 | 75.9% |
| 2021 | 34 | 28 | 82.4% |
| 2022 | 34 | 28 | 82.4% |
| 2023 | 46 | 33 | 71.7% |
| 2024 | 45 | 44 | 97.8% |
| 2025 | 50 | 32 | 64.0% |
| 2026 | 26 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 263 | 1.5% | 1.5% | 91.3% | 2.3% |
| Action 2 | 117 | 0.9% | 0.0% | 98.3% | 0.0% |
| Action 3 | 49 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 4 | 18 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 5 | 6 | 0.0% | 0.0% | 83.3% | 16.7% |
| Action 6 | 2 | 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
2019: PEG
0.0%
1.2%
0.0%
0.0%
2.5%
2024: AI examples
0.0%
2025: August memo
3.6%
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.