Prosecution Insights
Last updated: October 27, 2026

Zhengfu J Feng, USPTO Patent Examiner

Listed by the USPTO as FENG, ZHENGFU J

Tech Center 2800 • Art Units: 2835 2841

This examiner grants 76% of resolved cases

Analysis

FENG, ZHENGFU J has 516 resolved cases in Tech Center 2800 and art unit 2835. The allowance rate is 75.6%, and the interview lift is 38.8%. The median time to allowance is 938 days. The record combines a substantial resolved-case volume with an allowance outcome and interview effect that make examiner-specific prosecution planning relevant.

The listed companies are Intel Corporation, Sony Group Corporation, and Nintendo Co., Ltd. The listed firms are Alliance IP, LLC - Intel, Barnes & Thornburg LLP (IN), and Barron & Young PLLC. Applicants represented by these organizations may find it useful to prepare focused interview positions alongside written claim and evidence amendments, particularly where interview engagement can support movement toward allowance.

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

Performance Statistics

75.6%
Allow Rate
+7.6% vs TC avg
555
Total Applications
+38.8%
Interview Lift
938
Avg Prosecution Days
Based on 516 resolved cases, 2023–2026

Rejection Statute Breakdown

0.2%
§101 Eligibility
22.5%
§102 Novelty
54.7%
§103 Obviousness
21.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18762079 ELECTRONIC APPARATUS Non-Final OA Nintendo Co., Ltd.
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.
18897675 LAPTOP COOLING VIA LOW-PRESSURE AIR MOVER Final Rejection Intel Corporation
18499112 IMMERSION COOLING SYSTEM WITH FIRST AND SECOND PRIMARY LOOPS Non-Final OA Intel Corporation
18477881 LAPTOP BLOWER USING AC IONIC WIND PRINCIPLES Non-Final OA Intel Corporation
18851768 HEAT DISSIPATION DEVICE AND BASE STATION EQUIPMENT Non-Final OA ZTE CORPORATION
18743879 SERVER COOLING WITH IMMERSED HEAT SINK Final Rejection Carrier 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.
18973407 COOLER Non-Final OA TILTA INC.
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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Frequently Asked Questions

What is examiner Zhengfu J Feng's allowance rate?

75.6% of resolved applications examined by Zhengfu J Feng were allowed (516 resolved cases), compared with 56.2% across Art Unit 2835 over the last five years.

Does an interview help with examiner Zhengfu J Feng?

This examiner's interview lift is +38.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Zhengfu J Feng take to allow a patent?

Applications allowed by Zhengfu J Feng took 938 days on average from filing to allowance.

Which art unit does examiner Zhengfu J Feng work in?

Zhengfu J Feng examines applications in Art Unit 2835 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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