Examiner Hilary Ann Petrash
Grant ratio: 30.9% (30th percentile in Art Unit 1644 among examiners with at least 20 applications). Average office actions per grant: 1.79. Most common rejection type: §112.
Recently active
Last office action in data: October 2026
Examiner record
- Examiner ID
- 98487
- Primary art unit
- 1644
- Work group
- 1640
- Technology center
- 1600
- Applications
- 94
- Granted applications
- 29
- Examiner phone
- (703) 756-4630
- Supervisor
- Daniel E. Kolker
- Supervisor phone
- (571) 272-3181
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 26 | 41.7% | 2.12 |
| Group | 221 | 43.1% | 1.95 |
| Tech Center | 1,383 | 37.4% | 2.02 |
| USPTO | 16,620 | 51.8% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 2 | 2.1% |
| 1 OA | 31 | 33.0% |
| 2 OAs | 33 | 35.1% |
| 3 OAs | 13 | 13.8% |
| 4 OAs | 14 | 14.9% |
| 5+ OAs | 1 | 1.1% |
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 | 9 | 7 | 77.8% |
| 2024 | 20 | 14 | 70.0% |
| 2025 | 33 | 8 | 24.2% |
| 2026 | 32 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 92 | 0.0% | 10.9% | 18.5% | 9.8% |
| Action 2 | 61 | 0.0% | 1.6% | 16.4% | 32.8% |
| Action 3 | 28 | 0.0% | 3.6% | 14.3% | 46.4% |
| Action 4 | 15 | 0.0% | 0.0% | 13.3% | 60.0% |
| Action 5 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-10-23–2026-10-23. All years includes every dated office action in the data.
By year
0.0%
2024: AI examples
0.0%
2025: August memo
0.0%
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. 30, 2026.