Examiner Binh C. Tat
Grant ratio: 83.1% (35th percentile in Art Unit 2851 among examiners with at least 20 applications). Average office actions per grant: 1.73. Most common rejection type: §102.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 74962
- Primary art unit
- 2851
- Work group
- 2850
- Technology center
- 2800
- Applications
- 1,242
- Granted applications
- 1,032
- Examiner phone
- (571) 272-1908
- Supervisor
- Drew Dunn
- Supervisor phone
- (571) 272-2312
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 26 | 75.8% | 1.52 |
| 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 | 3 | 0.2% |
| 1 OA | 703 | 56.6% |
| 2 OAs | 344 | 27.7% |
| 3 OAs | 97 | 7.8% |
| 4 OAs | 53 | 4.3% |
| 5+ OAs | 42 | 3.4% |
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 | 55 | 46 | 83.6% |
| 2009 | 78 | 64 | 82.1% |
| 2010 | 47 | 39 | 83.0% |
| 2011 | 55 | 43 | 78.2% |
| 2012 | 66 | 59 | 89.4% |
| 2013 | 93 | 88 | 94.6% |
| 2014 | 64 | 57 | 89.1% |
| 2015 | 83 | 72 | 86.7% |
| 2016 | 77 | 67 | 87.0% |
| 2017 | 54 | 45 | 83.3% |
| 2018 | 77 | 67 | 87.0% |
| 2019 | 59 | 53 | 89.8% |
| 2020 | 74 | 66 | 89.2% |
| 2021 | 61 | 56 | 91.8% |
| 2022 | 66 | 59 | 89.4% |
| 2023 | 69 | 66 | 95.7% |
| 2024 | 59 | 52 | 88.1% |
| 2025 | 66 | 33 | 50.0% |
| 2026 | 39 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 1,239 | 1.6% | 93.8% | 1.1% | 0.1% |
| Action 2 | 536 | 6.7% | 87.3% | 1.7% | 0.0% |
| Action 3 | 192 | 8.9% | 82.3% | 1.6% | 0.0% |
| Action 4 | 95 | 9.5% | 82.1% | 4.2% | 0.0% |
| Action 5 | 42 | 7.1% | 81.0% | 7.1% | 2.4% |
| Action 6 | 23 | 8.7% | 82.6% | 4.3% | 0.0% |
| Action 7 | 11 | 0.0% | 72.7% | 27.3% | 0.0% |
| Action 8 | 5 | 0.0% | 80.0% | 20.0% | 0.0% |
| Action 9 | 3 | 0.0% | 100.0% | 0.0% | 0.0% |
| Action 10 | 2 | 0.0% | 100.0% | 0.0% | 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%
3.2%
3.3%
8.8%
1.4%
2014: Alice
0.0%
0.9%
1.8%
11.2%
27.1%
2019: PEG
2.7%
0.0%
0.0%
0.0%
0.0%
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 Aug. 27, 2026.