Examiner Hung S. Bui
Grant ratio: 83.5% (94th percentile in Art Unit 2835 among examiners with at least 20 applications). Average office actions per grant: 1.32. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 78275
- Primary art unit
- 2835
- Work group
- 2840
- Technology center
- 2800
- Applications
- 1,684
- Granted applications
- 1,406
- Examiner phone
- (571) 272-2102
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 46 | 66.9% | 1.64 |
| Group | 231 | 68.9% | 1.60 |
| 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 | 1 | 0.1% |
| 1 OA | 1,308 | 77.7% |
| 2 OAs | 262 | 15.6% |
| 3 OAs | 86 | 5.1% |
| 4 OAs | 12 | 0.7% |
| 5+ OAs | 15 | 0.9% |
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 | 79 | 62 | 78.5% |
| 2009 | 119 | 87 | 73.1% |
| 2010 | 124 | 93 | 75.0% |
| 2011 | 109 | 97 | 89.0% |
| 2012 | 109 | 92 | 84.4% |
| 2013 | 89 | 73 | 82.0% |
| 2014 | 77 | 63 | 81.8% |
| 2015 | 72 | 58 | 80.6% |
| 2016 | 76 | 71 | 93.4% |
| 2017 | 101 | 92 | 91.1% |
| 2018 | 87 | 83 | 95.4% |
| 2019 | 103 | 97 | 94.2% |
| 2020 | 88 | 81 | 92.0% |
| 2021 | 82 | 77 | 93.9% |
| 2022 | 78 | 77 | 98.7% |
| 2023 | 79 | 74 | 93.7% |
| 2024 | 76 | 72 | 94.7% |
| 2025 | 91 | 57 | 62.6% |
| 2026 | 45 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 1,683 | 0.3% | 17.8% | 78.2% | 0.5% |
| Action 2 | 375 | 0.3% | 13.1% | 84.3% | 1.1% |
| Action 3 | 113 | 0.0% | 9.7% | 88.5% | 0.0% |
| Action 4 | 27 | 0.0% | 14.8% | 85.2% | 0.0% |
| Action 5 | 15 | 0.0% | 20.0% | 73.3% | 6.7% |
| Action 6 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 2 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 8 | 1 | 0.0% | 0.0% | 100.0% | 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%
1.0%
0.0%
0.0%
0.0%
1.9%
2014: Alice
0.0%
0.0%
0.0%
0.0%
0.0%
2019: PEG
0.7%
0.9%
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.