Prosecution Insights
Last updated: April 19, 2026

Examiner: ESSEX, STEPHAN J

Tech Center 1700 • Art Units: 1727 1795

This examiner grants 65% of resolved cases

Performance Statistics

65.2%
Allow Rate
At TC average
710
Total Applications
-16.0%
Interview Lift
1358
Avg Prosecution Days
Based on 683 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
23.0%
§102 Novelty
55.6%
§103 Obviousness
17.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19294292 BATTERY CELL, BATTERY, AND POWER CONSUMING DEVICE Non-Final OA CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
18470231 ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND METHOD AND APPARATUS FOR MANUFACTURING ELECTRODE ASSEMBLY Final Rejection CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
18468906 NON-AQUEOUS ELECTROLYTE AND SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK AND ELECTRICAL DEVICE CONTAINING THE SAME Non-Final OA CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
18281236 POROUS CARBON MATERIAL, METHOD FOR PREPARING THE SAME, ELECTRODE COMPRISING THE SAME, AND LITHIUM-SULFUR BATTERY Non-Final OA LG Energy Solution, Ltd.
18280799 COOLING MEMBER, AND BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME Non-Final OA LG ENERGY SOLUTION, LTD.
18270353 NEGATIVE ELECTRODE ACTIVE MATERIAL, METHOD FOR MANUFACTURING NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE COMPRISING NEGATIVE ELECTRODE ACTIVE MATERIAL, AND SECONDARY BATTERY COMPRISING SAME Non-Final OA LG ENERGY SOLUTION, LTD.
18331830 PASSIVATION MATERIALS ON ALKALINE EARTH METALS Non-Final OA Massachusetts Institute of Technology
18467433 Cross-Linkable Solid Electrolyte Membrane for All-Solid-State Batteries and Method of Manufacturing the Same Non-Final OA IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
18605202 BATTERY SYSTEMS BASED ON LITHIUM DIFLUOROPHOSPHATE Non-Final OA Tesla, Inc.
18026655 ALL-SOLID-STATE BATTERY AND MANUFACTURING METHOD THEREOF Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18449529 THERMAL AND ELECTRICAL MANAGEMENT OF BATTERY PACKS Non-Final OA QUANTUMSCAPE BATTERY, INC.
18546429 COMPOSITION FOR ELECTROCHEMICAL DEVICE FUNCTIONAL LAYER, FUNCTIONAL LAYER FOR ELECTROCHEMICAL DEVICE, LAMINATE FOR ELECTROCHEMICAL DEVICE, AND ELECTROCHEMICAL DEVICE Non-Final OA ZEON CORPORATION
18090086 CURRENT COLLECTOR, ELECTROCHEMICAL DEVICE CONTAINING SAME, AND ELECTRONIC DEVICE Non-Final OA Ningde Amperex Technology Limited
18022440 FLUORINATED ELECTRODES AND BATTERIES CONTAINING THE SAME Non-Final OA CARNEGIE MELLON UNIVERSITY
18462063 SECONDARY BATTERY Non-Final OA UNIVERSITY OF TSUKUBA
18003240 BIAXIALLY STRETCHED POLYPHENYLENE SULFIDE FILM AND SECONDARY BATTERY ELECTRODE FILM COMPOSED OF SAME Non-Final OA TOYOBO CO., LTD.
18010737 ANODES FOR LITHIUM-BASED ENERGY STORAGE DEVICES Non-Final OA Graphenix Development, Inc.

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