Prosecution Insights
Last updated: October 02, 2026

Examiner: DU, ZONGHUA A

Tech Center 2400 • Art Units: 2444 2447 2448

This examiner grants 59% of resolved cases

Analysis

Zonghua A Du is an examiner in Tech Center 2400 and Art Unit 2444. The data for this profile includes 83 resolved cases. These cases result in an allowance rate of 59.0 percent. For applications assigned to this examiner, the median days to allowance is 964. This duration provides a timeline for practitioners to use during the prosecution process.

The interview lift is 42.1 percent. This figure represents the change in the allowance rate when an interview is conducted. When compared to the baseline allowance rate of 59.0 percent, the 42.1 percent lift suggests that interviews are a factor in reaching an allowance. The 964 median days to allowance is a measure of the time required for these resolutions.

With 83 resolved cases, the statistical profile is based on a set of outcomes in Tech Center 2400. The allowance rate and the interview lift are the metrics for this Art Unit 2444 examiner. Practitioners can use these figures to evaluate the potential impact of procedural choices on the median days to allowance.

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

Performance Statistics

59.0%
Allow Rate
+1.0% vs TC avg
110
Total Applications
+42.1%
Interview Lift
964
Avg Prosecution Days
Based on 83 resolved cases, 2023–2026

Rejection Statute Breakdown

2.4%
§101 Eligibility
7.7%
§102 Novelty
65.7%
§103 Obviousness
21.3%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19100158 CYCLE TIME DETERMINATION IN A PROCESS CONTROL SYSTEM Non-Final OA ABB Schweiz AG
17838951 VISUALIZATION OF A SOFTWARE DEFINED PROCESS CONTROL SYSTEM FOR INDUSTRIAL PROCESS PLANTS Final Rejection FISHER-ROSEMOUNT SYSTEMS, INC.
18729877 ANALYSIS DEVICE, ANALYSIS METHOD, AND ANALYSIS PROGRAM Non-Final OA NTT, Inc.
18678503 INFORMATION INTERACTION METHOD AND APPARATUS, AND COMMUNICATION DEVICE Non-Final OA VIVO MOBILE COMMUNICATION CO., LTD.
18876462 NETWORK ACCESS CONTROL METHOD, AND CUSTOMER PREMISE EQUIPMENT AND STORAGE MEDIUM Non-Final OA ZTE CORPORATION
18855899 AUDIO AND VIDEO CLOUD NETWORK, ACCESS METHOD, ROUTING FORWARDING METHOD, AND READABLE STORAGE MEDIUM Final Rejection ZTE CORPORATION
18347609 MANAGEMENT SERVER, VEHICLE NETWORK SYSTEM, AND COMMUNICATION TRAFFIC COLLECTION METHOD Non-Final OA DENSO CORPORATION
18876956 INTER-DEVICE POINT-TO-POINT COMMUNICATION METHOD, SYSTEM AND APPARATUS, DEVICE, AND STORAGE MEDIUM Final Rejection SUZHOU METABRAIN INTELLIGENT TECHNOLOGY CO., LTD.
18796701 DECENTRALIZED HIERARCHICAL CONTROL PLANE FOR VIRTUALIZATION MANAGEMENT IN EDGE DEVICES AND HYBRID CLOUD ENVIRONMENTS Non-Final OA Red Hat, Inc.
18107284 NETWORK THROUGHPUT TESTS AT PREDEFINED THRESHOLDS Final Rejection VIAVI SOLUTIONS INC.
18791253 TELEMETRY DATA PROCESSING IN CLUSTER FILE SYSTEM WITH DYNAMIC REGISTRATION OF METRICS FOR SHORT DURATION Final Rejection Dell Products L.P.
19182878 PERFORMING DATA CATEGORIZATION BY AN END-USER DEVICE Non-Final OA Fortinet, Inc.
18913856 FLOW CHANNEL HASH FUNCTION Non-Final OA Hewlett Packard Enterprise Development LP
18844540 Routing Method and System, and Storage Medium Final Rejection China Mobile Communications Group Co., Ltd.
19000360 Programmable Voice Extension Framework Final Rejection Twilio Inc.
16985624 Programmable Voice Extension Framework Final Rejection Twilio Inc.

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