Prosecution Insights
Last updated: April 19, 2026

Examiner: CARROLL, DAVID P.

Tech Center 3700 • Art Units: 3674 3676 3746

This examiner grants 80% of resolved cases

Performance Statistics

80.3%
Allow Rate
+10.3% vs TC avg
698
Total Applications
+14.5%
Interview Lift
874
Avg Prosecution Days
Based on 689 resolved cases, 2023–2026

Rejection Statute Breakdown

0.6%
§101 Eligibility
24.1%
§102 Novelty
36.4%
§103 Obviousness
31.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19320178 LUBRICATOR ASSEMBLY WITH FLANGE OR FLOW BLOCK MOUNTED CATCHER Non-Final OA Tier 1 Energy Solutions, Inc.
19291573 CONVERSION OF A CARRIER SERVICE RIG TO A TRAILER SERVICE RIG Non-Final OA Axis Energy Services, LLC
19191078 METHODS AND APPARATUS FOR BITLESS DRILLING Final Rejection Helmerich & Payne Technologies, LLC
19090584 CHECK VALVE FOR DOWNHOLE GAS LINES Non-Final OA Liberty Lift Solutions, LLC
18949812 PISTON-DIAPHRAGM PUMP FOR DRILLING OPERATIONS Non-Final OA Helmerich & Payne, Inc.
18539040 APPARATUS AND METHOD FOR A GAS LIFT VALVE Non-Final OA Oracle Downhole Services Ltd.

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