Examiner Subir K Chowdhury
Grant ratio: 23.5% (8th percentile in Art Unit 2132 among examiners with at least 20 applications). Average office actions per grant: 2.56. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 91398
- Primary art unit
- 2132
- Work group
- 2130
- Technology center
- 2100
- Applications
- 68
- Granted applications
- 16
- Examiner phone
- (703) 756-1207
- Supervisor
- Hosain Alam
- Supervisor phone
- (571) 272-3978
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 21 | 72.2% | 2.06 |
| Group | 138 | 68.8% | 2.08 |
| Tech Center | 1,781 | 52.8% | 2.19 |
| 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 | 11 | 16.2% |
| 2 OAs | 26 | 38.2% |
| 3 OAs | 8 | 11.8% |
| 4 OAs | 16 | 23.5% |
| 5+ OAs | 7 | 10.3% |
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 | 4 | 3 | 75.0% |
| 2025 | 25 | 13 | 52.0% |
| 2026 | 39 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 68 | 0.0% | 1.5% | 94.1% | 0.0% |
| Action 2 | 57 | 0.0% | 3.5% | 91.2% | 3.5% |
| Action 3 | 31 | 3.2% | 3.2% | 83.9% | 6.5% |
| Action 4 | 23 | 0.0% | 0.0% | 91.3% | 8.7% |
| Action 5 | 7 | 0.0% | 0.0% | 85.7% | 14.3% |
| Action 6 | 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
2024: AI examples
0.0%
2025: August memo
1.0%
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.