Prosecution Insights
Last updated: October 02, 2026

Examiner: FENG, ZHENGFU J

Tech Center 2800 • Art Units: 2835 2841

This examiner grants 76% of resolved cases

Analysis

Zhengfu J. Feng is an examiner in Tech Center 2800 and Art Unit 2835. Across 514 resolved cases, the examiner has a high allowance rate of 75.5 percent. The interview lift is also significant at 39.0 percent, indicating that interviews are highly effective. The median days to allowance is 939. Practitioners should leverage the 39.0 percent interview lift to significantly improve the 75.5 percent baseline allowance rate.

With 514 cases resolved, the data provides a robust and reliable perspective on the examiner's performance. The 939 days to allowance is a standard timeframe for this volume of cases. In Art Unit 2835, the combination of a high allowance rate and a strong interview lift is very favorable for applicants. These metrics from Tech Center 2800 suggest that proactive communication is a key driver of success. Applicants can expect a predictable and relatively efficient prosecution process. The 75.5 percent allowance rate and 39.0 percent lift make this examiner approachable.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

75.5%
Allow Rate
+7.5% vs TC avg
534
Total Applications
+39.0%
Interview Lift
939
Avg Prosecution Days
Based on 514 resolved cases, 2023–2026

Rejection Statute Breakdown

0.2%
§101 Eligibility
21.8%
§102 Novelty
55.7%
§103 Obviousness
20.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18912603 COOLING SYSTEM Non-Final OA TOYOTA JIDOSHA KABUSHIKI KAISHA
18855385 COOLING FAN, ELECTRONIC DEVICE, AND METHOD FOR MANUFACTURING ELECTRONIC DEVICE Non-Final OA Sony Interactive Entertainment Inc.
18854076 ELECTRONIC DEVICE Non-Final OA Sony Interactive Entertainment Inc.
18826998 VAPOR CHAMBER HEAT SPREADER Non-Final OA International Business Machines Corporation
18851768 HEAT DISSIPATION DEVICE AND BASE STATION EQUIPMENT Non-Final OA ZTE CORPORATION
18897793 COOLING MASS AND SPRING ELEMENT FOR LOW INSERTION FORCE HOT SWAPPABLE ELECTRONIC COMPONENT INTERFACE Non-Final OA SK Hynix NAND Product Solutions Corp. (dba Solidigm)
18916246 NOVEL HEAT PIPE CONFIGURATIONS Non-Final OA HONEYWELL INTERNATIONAL INC.
18853002 LIQUID COOLING APPARATUS AND SERVER Non-Final OA SUZHOU METABRAIN INTELLIGENT TECHNOLOGY CO., LTD.
18891225 SYSTEM AND METHOD FOR MONITORING LIQUID COOLANT IN AN INFORMATION HANDLING SYSTEM Non-Final OA DELL PRODUCTS L.P.
18774958 LIMITING STRUCTURE AND LIMITING METHOD THEREOF Non-Final OA FIVEGRAND INTERNATIONAL CO., LTD.
18583258 TRANSISTOR CARRIER AND COOLING MECHANISM Non-Final OA Garrett Transportation I Inc.
18844337 Liquid Immersion Cooling Platform with an Adjustable Weir and Multifunctional Compute Device Handles Non-Final OA Modine LLC
18852895 SYSTEMS AND METHODS FOR THERMAL MANAGEMENT OF EXTERNALLY MOUNTED ELECTRONIC EQUIPMENT FOR AN AIRCRAFT Non-Final OA TRAK TECOM Corporation

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