Examiner Steve T. Chung
Grant ratio: 52.8% (47th percentile in Art Unit 2859 among examiners with at least 20 applications). Average office actions per grant: 2.47. Most common rejection type: §103.
Appears inactive
Last office action in data: March 2016
Examiner record
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 56 | 45.9% | 1.72 |
| Group | 380 | 61.0% | 1.65 |
| 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 | 60 | 42.3% |
| 2 OAs | 34 | 23.9% |
| 3 OAs | 14 | 9.9% |
| 4 OAs | 16 | 11.3% |
| 5+ OAs | 18 | 12.7% |
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 |
|---|---|---|---|
| 2010 | 2 | 0 | 0.0% |
| 2011 | 31 | 24 | 77.4% |
| 2012 | 20 | 5 | 25.0% |
| 2013 | 21 | 8 | 38.1% |
| 2014 | 45 | 28 | 62.2% |
| 2015 | 19 | 8 | 42.1% |
| 2016 | 4 | 2 | 50.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 142 | 0.7% | 21.1% | 69.0% | 5.6% |
| Action 2 | 82 | 0.0% | 22.0% | 72.0% | 4.9% |
| Action 3 | 48 | 0.0% | 10.4% | 83.3% | 4.2% |
| Action 4 | 34 | 0.0% | 14.7% | 85.3% | 0.0% |
| Action 5 | 18 | 0.0% | 11.1% | 88.9% | 0.0% |
| Action 6 | 11 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 6 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 8 | 3 | 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
0.0%
0.0%
0.0%
1.2%
2014: Alice
0.0%
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.