Prosecution Insights
Last updated: April 19, 2026

Examiner: STEPHENSON, DANIEL P

Tech Center 3600 • Art Units: 3676

This examiner grants 86% of resolved cases

Performance Statistics

86.5%
Allow Rate
+34.5% vs TC avg
1261
Total Applications
-25.9%
Interview Lift
882
Avg Prosecution Days
Based on 1252 resolved cases, 2023–2026

Rejection Statute Breakdown

2.3%
§101 Eligibility
32.4%
§102 Novelty
39.0%
§103 Obviousness
14.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18402190 RESISTIVITY INVERSION INTERPRETATION BY AI ASSISTANT DURING GEOSTEERING JOB Non-Final OA Halliburton Energy Services, Inc.
19291369 METHOD OF RETROFITTING A SERVICE RIG Non-Final OA Axis Energy Services, LLC
19265750 METHOD FOR CEMENTATION IN CARBONATE ROCKS UNDER SEVERE CIRCULATION LOSS CONDITIONS Non-Final OA PETROLEO BRASILEIRO S.A. - PETROBRAS
19182052 Perforating Gun and Method of Using Same Non-Final OA Reach Wireline, LLC
19019128 APPARATUS, SYSTEM AND PROCESS FOR REGULATING A CONTROL MECHANISM OF A WELL Non-Final OA Intelligent Wellhead Systems Inc.
19015337 COMPACT DOWNHOLE TOOL Final Rejection NINE DOWNHOLE TECHNOLOGIES, LLC
18857936 Vibratory Burrowing Probe for Investigating Subsurface Regions of Granular Media in IG and Low/Micro Gravity Conditions Non-Final OA Polyvalor, Limited Partnership
18633782 DOWNHOLE TOOL WITH SELF- ORIENTING SWIVEL AND METHOD OF USING SAME Non-Final OA GR Energy Services Management, LP
18629862 DOWNHOLE ANCHORING ASSEMBLY Non-Final OA Oilify New-tech Solutions Inc.

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