Prosecution Insights
Last updated: October 02, 2026

Examiner: CHUNG, HOSUNG CHARLES

Tech Center 1700 • Art Units: 1754 1759 1794

This examiner grants 59% of resolved cases

Analysis

Hosung Charles Chung works in Art Unit 1754 of Tech Center 1700 and has 486 resolved cases. The allowance rate is 59.1 percent. This percentage reflects the frequency of grants within the examiner's portfolio. The median days to allowance is 1120, which measures the time from the initial filing to the final issuance.

The interview lift is 38.3 percent. This figure indicates a significant increase in the probability of success for cases that include an interview. Practitioners can use this 38.3 percent lift to evaluate the impact of oral advocacy. The 486 cases provide the statistical grounding for these observations in Art Unit 1754.

The 1120 median days to allowance acts as a guide for prosecution timelines in Tech Center 1700. With an allowance rate of 59.1 percent, the data shows the frequency of successful outcomes. These metrics offer a clear perspective on the examiner's historical performance. The record of resolved cases helps in understanding the procedural environment.

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

Performance Statistics

59.1%
Allow Rate
-5.9% vs TC avg
511
Total Applications
+38.3%
Interview Lift
1120
Avg Prosecution Days
Based on 486 resolved cases, 2023–2026

Rejection Statute Breakdown

0.8%
§101 Eligibility
11.1%
§102 Novelty
55.4%
§103 Obviousness
28.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18287056 APPARATUS FOR ELECTROCHEMICAL AMMUNITION DISPOSAL AND MATERIAL RECOVERY Non-Final OA UNIVERSITY OF MASSACHUSETTS
18244371 HYDROGEN PRODUCTION SYSTEM AND HYDROGEN PRODUCTION METHOD Non-Final OA IHI CORPORATION
18106436 SYSTEM AND METHODS FOR LOW-VOLTAGE BIPOLAR HYDROGEN PRODUCTION FROM ALDEHYDES AND WATER Final Rejection IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
18034217 WATER SPLITTING DEVICE PROTECTION Final Rejection The Regents of the University of Michigan
18036319 ANODE FOR ANION EXCHANGE MEMBRANE WATER ELECTROLYSIS Final Rejection KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
18005944 SYSTEMS AND METHODS RELATING TO WATER ELECTROLYSIS Final Rejection THE PENN STATE RESEARCH FOUNDATION
18251104 CATHODE CATALYST LAYER, ORGANIC HYDRIDE PRODUCING DEVICE, AND METHOD FOR PREPARING CATHODE CATALYST INK Non-Final OA ENEOS Corporation
18253884 MEMBRANE-LESS ELECTROLYZER WITH POROUS WALLS FOR HIGH THROUGHPUT AND PURE HYDROGEN PRODUCTION Non-Final OA ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
18194019 ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS Non-Final OA Dongguan Amperex Technology Limited
18246638 Method for Manufacturing Colored Product and Mobile Phone shell Final Rejection BEIJING HUAYU CHUANGXIN TA-NB SCIENCE & TECHNOLOGY CO., LTD.

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