Examiner Chun-Nan Lin
Grant ratio: 77.4% (75th percentile in Art Unit 2693 among examiners with at least 20 applications). Average office actions per grant: 1.90. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 89193
- Primary art unit
- 2693
- Work group
- 2690
- Technology center
- 2600
- Applications
- 695
- Granted applications
- 538
- Examiner phone
- (571) 272-5646
- Supervisor
- Benjamin C Lee
- Supervisor phone
- (571) 272-2963
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 15 | 64.8% | 2.05 |
| Group | 96 | 51.2% | 2.11 |
| Tech Center | 1,754 | 57.4% | 1.88 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 6 | 0.9% |
| 1 OA | 358 | 51.5% |
| 2 OAs | 180 | 25.9% |
| 3 OAs | 85 | 12.2% |
| 4 OAs | 37 | 5.3% |
| 5+ OAs | 29 | 4.2% |
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 |
|---|---|---|---|
| 2012 | 4 | 1 | 25.0% |
| 2013 | 26 | 13 | 50.0% |
| 2014 | 29 | 20 | 69.0% |
| 2015 | 31 | 27 | 87.1% |
| 2016 | 32 | 24 | 75.0% |
| 2017 | 42 | 38 | 90.5% |
| 2018 | 67 | 59 | 88.1% |
| 2019 | 58 | 51 | 87.9% |
| 2020 | 78 | 63 | 80.8% |
| 2021 | 58 | 54 | 93.1% |
| 2022 | 53 | 50 | 94.3% |
| 2023 | 56 | 53 | 94.6% |
| 2024 | 55 | 54 | 98.2% |
| 2025 | 55 | 31 | 56.4% |
| 2026 | 51 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 689 | 1.2% | 1.2% | 67.9% | 21.0% |
| Action 2 | 331 | 1.2% | 0.6% | 74.0% | 20.8% |
| Action 3 | 151 | 3.3% | 0.7% | 75.5% | 17.9% |
| Action 4 | 66 | 0.0% | 0.0% | 89.4% | 10.6% |
| Action 5 | 29 | 0.0% | 0.0% | 82.8% | 13.8% |
| Action 6 | 12 | 0.0% | 0.0% | 83.3% | 16.7% |
| Action 7 | 6 | 0.0% | 0.0% | 83.3% | 16.7% |
| Action 8 | 4 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 9 | 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%
6.4%
2014: Alice
0.0%
0.0%
1.1%
0.0%
0.0%
2019: PEG
1.2%
5.0%
0.0%
0.0%
0.0%
2024: AI examples
1.4%
2025: August memo
0.0%
1.7%
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.