Examiner Hung Duong
Grant ratio: 84.2% (97th percentile in Art Unit 2835 among examiners with at least 20 applications). Average office actions per grant: 1.15. Most common rejection type: §102.
Appears inactive
Last office action in data: August 2016
Examiner record
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 46 | 66.9% | 1.64 |
| Group | 354 | 67.0% | 1.58 |
| 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 | 302 | 88.6% |
| 2 OAs | 31 | 9.1% |
| 3 OAs | 2 | 0.6% |
| 4 OAs | 6 | 1.8% |
| 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 |
|---|---|---|---|
| 2008 | 29 | 23 | 79.3% |
| 2009 | 68 | 54 | 79.4% |
| 2010 | 29 | 28 | 96.6% |
| 2011 | 50 | 44 | 88.0% |
| 2012 | 45 | 38 | 84.4% |
| 2013 | 48 | 40 | 83.3% |
| 2014 | 32 | 28 | 87.5% |
| 2015 | 29 | 23 | 79.3% |
| 2016 | 11 | 9 | 81.8% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 341 | 0.9% | 49.3% | 32.0% | 1.2% |
| Action 2 | 39 | 0.0% | 35.9% | 41.0% | 2.6% |
| Action 3 | 8 | 0.0% | 37.5% | 62.5% | 0.0% |
| Action 4 | 6 | 0.0% | 33.3% | 33.3% | 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
2.3%
0.0%
0.0%
1.8%
0.0%
0.0%
2014: Alice
2.6%
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.