Examiner Cheom-Gil Cheong
Grant ratio: 47.2% (28th percentile in Art Unit 1645 among examiners with at least 20 applications). Average office actions per grant: 1.96. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 95220
- Primary art unit
- 1645
- Work group
- 1640
- Technology center
- 1600
- Applications
- 214
- Granted applications
- 101
- Examiner phone
- (571) 272-6251
- Supervisor
- Gary Nickol
- Supervisor phone
- (571) 272-0835
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 25 | 47.8% | 2.04 |
| Group | 222 | 43.5% | 1.94 |
| Tech Center | 1,373 | 38.0% | 2.02 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 4 | 1.9% |
| 1 OA | 97 | 45.3% |
| 2 OAs | 56 | 26.2% |
| 3 OAs | 33 | 15.4% |
| 4 OAs | 14 | 6.5% |
| 5+ OAs | 10 | 4.7% |
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 |
|---|---|---|---|
| 2020 | 20 | 15 | 75.0% |
| 2021 | 25 | 14 | 56.0% |
| 2022 | 33 | 26 | 78.8% |
| 2023 | 34 | 19 | 55.9% |
| 2024 | 31 | 18 | 58.1% |
| 2025 | 31 | 9 | 29.0% |
| 2026 | 40 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 210 | 1.9% | 13.8% | 27.1% | 15.7% |
| Action 2 | 113 | 1.8% | 6.2% | 29.2% | 26.5% |
| Action 3 | 57 | 0.0% | 8.8% | 31.6% | 28.1% |
| Action 4 | 24 | 0.0% | 12.5% | 37.5% | 20.8% |
| Action 5 | 10 | 0.0% | 0.0% | 40.0% | 20.0% |
| Action 6 | 5 | 0.0% | 0.0% | 40.0% | 40.0% |
| Action 7 | 2 | 0.0% | 0.0% | 50.0% | 50.0% |
| Action 8 | 2 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 9 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 10 | 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
6.7%
3.1%
1.3%
0.0%
2024: AI examples
0.0%
2025: August memo
0.0%
4.1%
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.