Prosecution Insights
Last updated: April 19, 2026

Examiner: RO, YONG-SUK

Tech Center 3600 • Art Units: 3676

This examiner grants 85% of resolved cases

Performance Statistics

85.4%
Allow Rate
+33.4% vs TC avg
1297
Total Applications
+7.8%
Interview Lift
921
Avg Prosecution Days
Based on 1272 resolved cases, 2023–2026

Rejection Statute Breakdown

0.8%
§101 Eligibility
35.0%
§102 Novelty
31.2%
§103 Obviousness
24.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19330423 Tubing Anchor and Catcher Tool with Fluid-Enhanced Cone for Increased Fluid Flow Non-Final OA PetroTool International LLC
19326232 STABILIZER INCLUDING MODIFIED HELICAL WELLBORE STABILIZING ELEMENTS Non-Final OA Halliburton Energy Services, Inc.
19244983 BLUNT-NOSED ROLLER CONE HYBRID BIT Non-Final OA Schlumberger Technology Corporation
19281882 METHOD FOR SETTING A FRAC PLUG WITH A TUBULAR METAL SEAL Non-Final OA Paramount Design LLC
19225099 Method for Casing Recovery Non-Final OA Ardyne Holdings Limited
18637812 MODULAR PERFORATING GUN SYSTEMS AND METHODS Non-Final OA G&H Diversified Manufacturing LP
19198776 PRESSURE COMPENSATED FEEDTRHOUGH ASSEMBLY Non-Final OA OneSubsea IP UK Limited
18422623 ELECTROMAGNETIC TELEMETRY GAP SUB Non-Final OA Baker Hughes Oilfield Operations LLC
17211522 FLUID INLET SLEEVES FOR IMPROVING FLUID FLOW IN EARTH-BORING TOOLS, EARTH-BORING TOOLS HAVING FLUID INLET SLEEVES, AND RELATED METHODS Non-Final OA Baker Hughes Oilfield Operations LLC
19089897 MAGNETIC DEVICE FOR CONTROLLING FLUID FLOW IN A WELL Non-Final OA PETRÓLEO BRASILEIRO S.A. - PETROBRAS
19109167 PRESSURE-PRESERVED CORING TOOL, USE METHOD, AND RESERVOIR ANALYSIS METHOD Non-Final OA CNPC Greatwall Drilling Company
19036669 Systems and Methods for Conditioning a Gas Non-Final OA ProFrac Services, LLC
18972721 ROBOTIC HYDRO-EXCAVATION DEVICES Non-Final OA Nova Dynamics, LLC
18835978 MEASUREMENT OF PARTICLE CONCENTRATION IN A STREAM Non-Final OA Canopus Drilling Solutions Holding B.V.
18641765 FORMING PERTURBED IN-LINE PERFORATIONS Non-Final OA Schlumberger Middle East, S.A.
18432101 Fluid-Driven Dual-Mode Abrasive Perforation Tool Non-Final OA PROSHALE LLC
18278050 DOWNHOLE CABLE Non-Final OA WIRES&BYTES GMBH

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