Examiner David A Calderon
Examiner David A Calderon appears to be very difficult relative to their art unit, group, tech center, and USPTO peers. Their lifetime grant ratio is 0.0% and their rejection profile is dominated by ยง103.
Difficulty vs AU
Very Hard
Difficulty vs Group
Very Hard
Difficulty vs TC
Very Hard
Difficulty vs USPTO
Very Hard
Average OA / Grant
N/A
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Examiner Details
- Observed Examiner Years
- 1 years (2026-2026)
- Phone
- (571) 272-9866
- Predicted Supervisor
- Christina Johnson
- Supervisor Phone
- (571) 272-1176
- Tech Center
- 1700 - Chemical and Materials Engineering
- Group
- 1740 - Tires, Adhesive Bonding, Glass/Paper Making, Plastics Shaping and Molding
Metrics
- Applications Evaluated
- 7
- Granted Applications
- 0
- Non-Granted Applications
- 7
- Avg OA / Grant
- N/A
- Last OA Observed
- March 2026 (0 months ago)
- Art Units Seen
- 1742
Context Comparison
| Scope | Examiners | Lifetime Grant Ratio | Avg OA / Grant |
|---|---|---|---|
| This Examiner | 1 | 0.0% | N/A |
| Art Unit | 25 | 55.7% | 2.07 |
| Group | 195 | 53.9% | 2.05 |
| Tech Center | 1,713 | 47.3% | 2.14 |
| USPTO | 16,116 | 54.8% | 1.98 |
Grant Timeline
| Year | Applications | Granted | Grant Rate |
|---|---|---|---|
| No observed data before 2026; examiner may not yet have been active in the available dataset. | |||
| 2026 | 7 | 0 | 0.0% |
0 family-cache-validated grants; 0 OA-only grant signals.
Rejection Timeline
| OA # | Office Actions | § 101 Percentage | § 102 Percentage | § 103 Percentage | § 112 Percentage |
|---|---|---|---|---|---|
| 1 | 7 | 0.0% | 28.6% | 71.4% | 0.0% |
| 2 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |