Examiner Lioubov G Korotchkina
Grant ratio: 10.3% (30th percentile in Art Unit 1653 among examiners with at least 20 applications). Average office actions per grant: 2.08. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 98187
- Primary art unit
- 1653
- Work group
- 1650
- Technology center
- 1600
- Applications
- 116
- Granted applications
- 12
- Examiner phone
- (571) 270-0911
- Supervisor
- Sharmila G Landau
- Supervisor phone
- (571) 272-0614
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 30 | 28.7% | 2.39 |
| Group | 208 | 40.4% | 2.00 |
| 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 | 3.4% |
| 1 OA | 27 | 23.3% |
| 2 OAs | 37 | 31.9% |
| 3 OAs | 19 | 16.4% |
| 4 OAs | 22 | 19.0% |
| 5+ OAs | 7 | 6.0% |
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 |
|---|---|---|---|
| 2023 | 2 | 1 | 50.0% |
| 2024 | 19 | 9 | 47.4% |
| 2025 | 39 | 2 | 5.1% |
| 2026 | 56 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 112 | 0.9% | 1.8% | 73.2% | 2.7% |
| Action 2 | 85 | 1.2% | 4.7% | 69.4% | 4.7% |
| Action 3 | 48 | 4.2% | 2.1% | 64.6% | 8.3% |
| Action 4 | 29 | 0.0% | 0.0% | 93.1% | 6.9% |
| Action 5 | 7 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 6 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 8 | 2 | 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%
2024: AI examples
3.1%
2025: August memo
0.9%
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.