Examiner Biao Chen
Grant ratio: 25.4% (29th percentile in Art Unit 2611 among examiners with at least 20 applications). Average office actions per grant: 1.33. Most common rejection type: §103.
Recently active
Last office action in data: September 2026
Examiner record
- Examiner ID
- 99176
- Primary art unit
- 2611
- Work group
- 2610
- Technology center
- 2600
- Applications
- 71
- Granted applications
- 18
- Examiner phone
- (703) 756-1199
- Supervisor
- Kee M Tung
- Supervisor phone
- (571) 272-7794
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 39 | 46.9% | 1.87 |
| Group | 292 | 48.5% | 1.92 |
| Tech Center | 1,763 | 56.6% | 1.88 |
| USPTO | 16,620 | 51.8% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 0 | 0.0% |
| 1 OA | 40 | 56.3% |
| 2 OAs | 14 | 19.7% |
| 3 OAs | 10 | 14.1% |
| 4 OAs | 7 | 9.9% |
| 5+ OAs | 0 | 0.0% |
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 |
|---|---|---|---|
| 2024 | 7 | 7 | 100.0% |
| 2025 | 27 | 11 | 40.7% |
| 2026 | 37 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 71 | 0.0% | 1.4% | 84.5% | 9.9% |
| Action 2 | 31 | 0.0% | 6.5% | 83.9% | 0.0% |
| Action 3 | 17 | 0.0% | 0.0% | 94.1% | 5.9% |
| Action 4 | 7 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-10-23–2026-10-23. All years includes every dated office action in the data.
By year
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 Oct. 30, 2026.