Prosecution Insights
Last updated: April 19, 2026

Examiner: ZOLLINGER, NATHAN C

Tech Center 3700 • Art Units: 3671 3745 3746

This examiner grants 69% of resolved cases

Performance Statistics

69.3%
Allow Rate
-0.7% vs TC avg
888
Total Applications
+41.1%
Interview Lift
1113
Avg Prosecution Days
Based on 851 resolved cases, 2023–2026

Rejection Statute Breakdown

0.3%
§101 Eligibility
25.5%
§102 Novelty
48.0%
§103 Obviousness
22.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19368876 FRACTURING PUMP ARRANGEMENT USING A PLUNGER WITH AN INTERNAL FLUID PASSAGE Non-Final OA Kerr Machine Co.
18465738 DETERMINING ELECTRICAL SUBMERSIBLE PUMP LIFETIME EXPECTANCY Non-Final OA Saudi Arabian Oil Company
19255119 Twin Pump Unit Casing Having Motor Mounted Touchscreens Non-Final OA S.A. Armstrong Limited
19251885 BLOWER Non-Final OA JIANGSU DONGCHENG M&E TOOLS CO., LTD.
18704808 CYLINDER BLOCK AND HYDRAULIC DEVICE INCLUDING SAME Final Rejection KAWASAKI JUKOGYO KABUSHIKI KAISHA
19209370 COMPRESSED-AIR-DRIVEN VACUUM GENERATION DEVICE AND AREA SUCTION GRIPPER Non-Final OA J.Schmalz GmbH
19194652 DIAPHRAGM PUMP AND VALVE ASSEMBLY FOR A DIAPHRAGM PUMP Non-Final OA Wanner Engineering, Inc.
19191438 PAD PLUNGER Non-Final OA Tally Production Systems, LLC
19079066 PUMP AND COMBINATION PUMP/MIXER DEVICE WITH LOBED CHECK VALVE FLUID PASSAGES Non-Final OA ALPHINITY USA, INC.
18543358 BEND RESTRICTOR Non-Final OA NEXANS
18929327 MOBILE PUMP SYSTEM FOR MULTIPURPOSE WATER DELIVERY Non-Final OA Pump USA, LLC
18356916 COMPRSSSOR DRIVESHAFT MAGNETIC SUPPORT Final Rejection TRANE INTERNATIONAL INC.
18760277 WATER WELL SUBMERSIBLE PUMP FILTER Non-Final OA FES Labs, LLC
18679629 Dual Bias Regulator Assembly For Operating Diaphragm Pump Systems Final Rejection Autoquip, Inc.
18287005 WIRELINE THREAD PROTECTION SYSTEM WITH SELF-ALIGNING BIT AND METHOD OF USING SAME Non-Final OA GR Energy Services Management, LP
18207120 VAPOR CHAMBER DEGASSING TUBE STRUCTURE AND MANUFACTURING METHOD THEREOF Final Rejection TAIWAN MICROLOOPS CORP.
18415852 Mobile Compressor Startup Drive Non-Final OA ARCTIC COMPRESSOR, LLC
18685720 TRANSMISSION STRUCTURE, TRANSMISSION CONNECTION MECHANISM AND AIR COMPRESSOR Non-Final OA ZHEJIANG QIANJI INTELLIGENT TECHNOLOGY CO., LTD.
18571424 Hydraulic Accumulator Non-Final OA Hydac Technology GmbH
18560476 Grab Bucket Excavator Non-Final OA I.M.M. Hydraulics S.p.A.
18495692 Conduit Bore Plugging Tool Non-Final OA David Sanjines
18355096 Expandable and Contractable Hose Non-Final OA Synergy Shipping Solutions, LLC
18260501 CORRUGATED TUBING WITH EXTERNAL REINFORCEMENT Non-Final OA INDUSTRIE ILPEA S.P.A.
18211668 INTELLIGENT DRYING DEVICE FOR TRANSFORMER Final Rejection Fortune Electric Co., Ltd.
18326336 Expandable and contractible garden hose Non-Final OA TELEBRANDS CORP
17810916 FUEL CELL FLUID DISCHARGE SYSTEM, A FUEL CELL SYSTEM, AND A METHOD FOR DISCHARGING BYPRODUCTS PRODUCED DURING FUEL CELL OPERATION Final Rejection Teledyne Energy Systems, Inc.

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