Examiner Weibin Huang
Grant ratio: 80.0% (36th percentile in Art Unit 2471 among examiners with at least 20 applications). Average office actions per grant: 1.58. Most common rejection type: §103.
Recently active
Last office action in data: October 2026
Examiner record
- Examiner ID
- 85700
- Primary art unit
- 2471
- Work group
- 2470
- Technology center
- 2400
- Applications
- 694
- Granted applications
- 555
- Examiner phone
- (571) 270-3695
- Supervisor
- Sujoy Kundu
- Supervisor phone
- (571) 272-8586
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 23 | 76.1% | 1.65 |
| Group | 204 | 62.6% | 1.93 |
| Tech Center | 1,763 | 57.8% | 2.14 |
| USPTO | 16,572 | 52.1% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 5 | 0.7% |
| 1 OA | 425 | 61.2% |
| 2 OAs | 169 | 24.4% |
| 3 OAs | 53 | 7.6% |
| 4 OAs | 27 | 3.9% |
| 5+ OAs | 15 | 2.2% |
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 | 3 | 1 | 33.3% |
| 2009 | 23 | 18 | 78.3% |
| 2010 | 39 | 29 | 74.4% |
| 2011 | 34 | 27 | 79.4% |
| 2012 | 21 | 20 | 95.2% |
| 2013 | 31 | 30 | 96.8% |
| 2014 | 34 | 30 | 88.2% |
| 2015 | 33 | 30 | 90.9% |
| 2016 | 57 | 51 | 89.5% |
| 2017 | 49 | 41 | 83.7% |
| 2018 | 43 | 41 | 95.3% |
| 2019 | 49 | 45 | 91.8% |
| 2020 | 29 | 29 | 100.0% |
| 2021 | 36 | 33 | 91.7% |
| 2022 | 40 | 39 | 97.5% |
| 2023 | 43 | 39 | 90.7% |
| 2024 | 44 | 39 | 88.6% |
| 2025 | 24 | 13 | 54.2% |
| 2026 | 62 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 689 | 3.8% | 12.5% | 66.9% | 7.3% |
| Action 2 | 264 | 1.5% | 11.0% | 72.3% | 6.8% |
| Action 3 | 95 | 4.2% | 5.3% | 77.9% | 7.4% |
| Action 4 | 42 | 14.3% | 7.1% | 73.8% | 2.4% |
| Action 5 | 15 | 0.0% | 0.0% | 93.3% | 6.7% |
| Action 6 | 3 | 0.0% | 0.0% | 33.3% | 33.3% |
| Action 7 | 2 | 50.0% | 0.0% | 50.0% | 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
0.0%
3.8%
7.2%
6.8%
0.0%
1.6%
2014: Alice
6.4%
1.6%
6.5%
7.5%
11.8%
2019: PEG
1.5%
2.4%
0.0%
0.0%
1.6%
2024: AI examples
1.8%
2025: August memo
3.3%
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 Oct. 9, 2026.