Examiner William George Trost Iv
Grant ratio: 5.4% (13th percentile in Art Unit 2641 among examiners with at least 20 applications). Average office actions per grant: 1.25. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 72330
- Primary art unit
- 2641
- Work group
- 2640
- Technology center
- 2600
- Applications
- 74
- Granted applications
- 4
- Examiner phone
- (571) 272-7872
- Supervisor
- Charles Appiah
- Supervisor phone
- (571) 272-7904
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 24 | 51.7% | 2.19 |
| Group | 226 | 57.7% | 2.06 |
| 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 | 1 | 1.4% |
| 1 OA | 51 | 68.9% |
| 2 OAs | 20 | 27.0% |
| 3 OAs | 2 | 2.7% |
| 4 OAs | 0 | 0.0% |
| 5+ OAs | 0 | 0.0% |
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 |
|---|---|---|---|
| 2008 | 1 | 1 | 100.0% |
| 2009 | 4 | 1 | 25.0% |
| 2010 | 2 | 1 | 50.0% |
| 2021 | 1 | 0 | 0.0% |
| 2025 | 15 | 1 | 6.7% |
| 2026 | 51 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 73 | 1.4% | 16.4% | 75.3% | 2.7% |
| Action 2 | 22 | 0.0% | 18.2% | 77.3% | 0.0% |
| Action 3 | 2 | 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%
0.0%
0.0%
0.0%
2025: August memo
3.8%
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.