Examiner David E Lotter
Grant ratio: 76.1% (58th percentile in Art Unit 2845 among examiners with at least 20 applications). Average office actions per grant: 1.47. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 89956
- Primary art unit
- 2845
- Work group
- 2840
- Technology center
- 2800
- Applications
- 620
- Granted applications
- 472
- Examiner phone
- (571) 270-7422
- Supervisor
- Dameon Levi
- Supervisor phone
- (571) 272-2105
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 50 | 67.0% | 1.67 |
| Group | 231 | 68.9% | 1.60 |
| 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 | 5 | 0.8% |
| 1 OA | 407 | 65.6% |
| 2 OAs | 158 | 25.5% |
| 3 OAs | 31 | 5.0% |
| 4 OAs | 15 | 2.4% |
| 5+ OAs | 4 | 0.6% |
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 |
|---|---|---|---|
| 2012 | 3 | 3 | 100.0% |
| 2013 | 30 | 17 | 56.7% |
| 2014 | 29 | 9 | 31.0% |
| 2015 | 14 | 7 | 50.0% |
| 2016 | 39 | 30 | 76.9% |
| 2017 | 48 | 43 | 89.6% |
| 2018 | 49 | 40 | 81.6% |
| 2019 | 42 | 40 | 95.2% |
| 2020 | 47 | 41 | 87.2% |
| 2021 | 53 | 51 | 96.2% |
| 2022 | 64 | 61 | 95.3% |
| 2023 | 57 | 51 | 89.5% |
| 2024 | 58 | 53 | 91.4% |
| 2025 | 47 | 26 | 55.3% |
| 2026 | 40 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 615 | 0.2% | 7.0% | 75.9% | 8.1% |
| Action 2 | 208 | 0.0% | 3.4% | 80.3% | 10.1% |
| Action 3 | 50 | 0.0% | 2.0% | 94.0% | 4.0% |
| Action 4 | 19 | 0.0% | 10.5% | 73.7% | 5.3% |
| Action 5 | 4 | 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
0.0%
0.0%
2014: Alice
0.0%
0.0%
0.0%
0.0%
0.0%
2019: PEG
1.7%
0.0%
0.0%
0.0%
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 Aug. 27, 2026.