Examiner Kezhen Shen
Grant ratio: 12.1% (2nd percentile in Art Unit 2627 among examiners with at least 20 applications). Average office actions per grant: 2.13. Most common rejection type: §103.
Appears inactive
Last office action in data: March 2011
Examiner record
Save this analysis
Download this examiner report.
Log in / Sign Up to exportPeer comparisons
| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 39 | 60.2% | 1.74 |
| Group | 279 | 55.5% | 2.00 |
| Tech Center | 1,754 | 57.4% | 1.88 |
| 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 | 36 | 54.5% |
| 2 OAs | 15 | 22.7% |
| 3 OAs | 11 | 16.7% |
| 4 OAs | 2 | 3.0% |
| 5+ OAs | 2 | 3.0% |
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 |
|---|---|---|---|
| 2008 | 26 | 1 | 3.8% |
| 2009 | 22 | 3 | 13.6% |
| 2010 | 16 | 3 | 18.8% |
| 2011 | 2 | 1 | 50.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 66 | 0.0% | 15.2% | 83.3% | 0.0% |
| Action 2 | 30 | 0.0% | 13.3% | 86.7% | 0.0% |
| Action 3 | 15 | 0.0% | 6.7% | 80.0% | 0.0% |
| Action 4 | 4 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 5 | 2 | 0.0% | 50.0% | 50.0% | 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%
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.