Examiner Duy M. Dang
Grant ratio: 84.0% (75th percentile in Art Unit 2667 among examiners with at least 20 applications). Average office actions per grant: 1.31. Most common rejection type: §103.
Recently active
Last office action in data: September 2026
Examiner record
- Examiner ID
- 74509
- Primary art unit
- 2667
- Work group
- 2660
- Technology center
- 2600
- Applications
- 902
- Granted applications
- 758
- Examiner phone
- (571) 272-7389
- Supervisor
- Amandeep Saini
- Supervisor phone
- (571) 272-3382
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 29 | 60.0% | 1.65 |
| Group | 288 | 62.7% | 1.66 |
| Tech Center | 1,759 | 56.9% | 1.88 |
| USPTO | 16,572 | 52.1% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 3 | 0.3% |
| 1 OA | 688 | 76.3% |
| 2 OAs | 157 | 17.4% |
| 3 OAs | 40 | 4.4% |
| 4 OAs | 12 | 1.3% |
| 5+ OAs | 2 | 0.2% |
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 | 51 | 40 | 78.4% |
| 2009 | 62 | 50 | 80.6% |
| 2010 | 69 | 64 | 92.8% |
| 2011 | 53 | 46 | 86.8% |
| 2012 | 38 | 36 | 94.7% |
| 2013 | 36 | 29 | 80.6% |
| 2014 | 40 | 37 | 92.5% |
| 2015 | 33 | 29 | 87.9% |
| 2016 | 40 | 37 | 92.5% |
| 2017 | 34 | 31 | 91.2% |
| 2018 | 59 | 57 | 96.6% |
| 2019 | 50 | 50 | 100.0% |
| 2020 | 45 | 43 | 95.6% |
| 2021 | 43 | 42 | 97.7% |
| 2022 | 38 | 37 | 97.4% |
| 2023 | 55 | 52 | 94.5% |
| 2024 | 51 | 49 | 96.1% |
| 2025 | 59 | 29 | 49.2% |
| 2026 | 46 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 899 | 22.2% | 19.0% | 21.5% | 17.1% |
| Action 2 | 211 | 18.0% | 18.5% | 38.4% | 10.9% |
| Action 3 | 54 | 7.4% | 14.8% | 44.4% | 11.1% |
| Action 4 | 14 | 7.1% | 7.1% | 50.0% | 0.0% |
| Action 5 | 2 | 50.0% | 0.0% | 50.0% | 0.0% |
| Action 6 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-10-02–2026-10-02. All years includes every dated office action in the data.
By year
16.7%
35.2%
38.1%
35.8%
55.6%
32.6%
2014: Alice
13.0%
23.7%
17.5%
4.8%
14.9%
2019: PEG
5.0%
7.1%
8.0%
15.2%
27.4%
2024: AI examples
11.9%
2025: August memo
11.9%
9.8%
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. 9, 2026.