Examiner Ryu-Sung Peter Weinmann
Grant ratio: 14.5% (22nd percentile in Art Unit 2859 among examiners with at least 20 applications). Average office actions per grant: 1.10. Most common rejection type: §103.
Recently active
Last office action in data: July 2026
Examiner record
- Examiner ID
- 99538
- Primary art unit
- 2859
- Work group
- 2850
- Technology center
- 2800
- Applications
- 69
- Granted applications
- 10
- Examiner phone
- (703) 756-5964
- Supervisor
- Julian Huffman
- Supervisor phone
- (571) 272-2147
Save this analysis
Download this examiner report.
Log in / Sign Up to exportPeer comparisons
| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 56 | 45.9% | 1.72 |
| Group | 380 | 61.0% | 1.65 |
| 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 | 0 | 0.0% |
| 1 OA | 25 | 36.2% |
| 2 OAs | 18 | 26.1% |
| 3 OAs | 12 | 17.4% |
| 4 OAs | 11 | 15.9% |
| 5+ OAs | 3 | 4.3% |
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 |
|---|---|---|---|
| 2024 | 2 | 2 | 100.0% |
| 2025 | 27 | 8 | 29.6% |
| 2026 | 40 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 69 | 1.4% | 17.4% | 71.0% | 4.3% |
| Action 2 | 44 | 4.5% | 15.9% | 77.3% | 0.0% |
| Action 3 | 26 | 0.0% | 15.4% | 80.8% | 3.8% |
| Action 4 | 14 | 0.0% | 28.6% | 71.4% | 14.3% |
| Action 5 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 6 | 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
2024: AI examples
0.0%
2025: August memo
1.1%
3.8%
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.