Examiner Euncha P Cherry
Grant ratio: 83.1% (87th percentile in Art Unit 2872 among examiners with at least 20 applications). Average office actions per grant: 1.20. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 76240
- Primary art unit
- 2872
- Work group
- 2870
- Technology center
- 2800
- Applications
- 1,079
- Granted applications
- 897
- Examiner phone
- (571) 272-2310
- Supervisor
- Pinping Sun
- Supervisor phone
- (571) 270-1284
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 102 | 61.9% | 1.70 |
| 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 | 4 | 0.4% |
| 1 OA | 923 | 85.5% |
| 2 OAs | 112 | 10.4% |
| 3 OAs | 30 | 2.8% |
| 4 OAs | 9 | 0.8% |
| 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 | 56 | 48 | 85.7% |
| 2009 | 69 | 52 | 75.4% |
| 2010 | 65 | 57 | 87.7% |
| 2011 | 66 | 55 | 83.3% |
| 2012 | 59 | 54 | 91.5% |
| 2013 | 78 | 65 | 83.3% |
| 2014 | 47 | 40 | 85.1% |
| 2015 | 44 | 39 | 88.6% |
| 2016 | 43 | 43 | 100.0% |
| 2017 | 34 | 34 | 100.0% |
| 2018 | 69 | 62 | 89.9% |
| 2019 | 67 | 59 | 88.1% |
| 2020 | 53 | 48 | 90.6% |
| 2021 | 60 | 54 | 90.0% |
| 2022 | 54 | 46 | 85.2% |
| 2023 | 64 | 61 | 95.3% |
| 2024 | 56 | 50 | 89.3% |
| 2025 | 60 | 30 | 50.0% |
| 2026 | 35 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 1,075 | 1.4% | 36.7% | 53.0% | 0.2% |
| Action 2 | 152 | 0.7% | 19.1% | 69.7% | 0.0% |
| Action 3 | 40 | 0.0% | 17.5% | 80.0% | 0.0% |
| Action 4 | 10 | 0.0% | 20.0% | 70.0% | 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
2.6%
3.4%
0.0%
4.2%
1.6%
0.0%
2014: Alice
4.1%
0.0%
0.0%
0.0%
2.5%
2019: PEG
0.0%
0.0%
0.0%
3.0%
0.0%
2024: AI examples
0.0%
2025: August memo
0.0%
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.