Prosecution Insights
Last updated: October 27, 2026

Chi D Nguy, USPTO Patent Examiner

Listed by the USPTO as NGUY, CHI D

Tech Center 2400 • Art Units: 2431 2435

This examiner grants 75% of resolved cases

Analysis

Chi D Nguy is an examiner in Tech Center 2400 with 515 resolved cases. The examiner maintains an allowance rate of 75.3 percent in Art Unit 2431. This rate is favorable for companies like Canon Inc. and Beijing Zitiao Network Technology Co., Ltd.

The interview lift is 15.9 percent. This figure suggests that interviews are a useful tool for increasing the chances of a grant compared to the 75.3 percent baseline. Firms such as FOLEY & LARDNER LLP and Harrity & Harrity, LLP can use interviews to resolve technical issues and move cases toward an allowance.

The median days to allowance is 1261. This timeline reflects the typical duration for successful prosecution for Relevant Compliance Inc. and Knobbe, Martens, Olson & Bear, LLP. Practitioners can use this 1261-day benchmark to manage expectations for patent pendency. The overall data from the 515 resolved cases suggests a productive environment for applicants, with interviews offering a path to improved outcomes.

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

Performance Statistics

75.3%
Allow Rate
+17.3% vs TC avg
547
Total Applications
+15.9%
Interview Lift
1261
Avg Prosecution Days
Based on 515 resolved cases, 2023–2026

Rejection Statute Breakdown

9.2%
§101 Eligibility
17.7%
§102 Novelty
52.7%
§103 Obviousness
11.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18952133 CONTENT ORIGIN VERIFYING SYSTEM THAT ALSO ALLOWS THIRD PARTY TO ACCURATELY ASCERTAIN AUTHENTICITY OF DIGITAL SIGNATURE, CONTROL METHOD FOR CONTENT ORIGIN VERIFYING SYSTEM, AND STORAGE MEDIUM Final Rejection CANON KABUSHIKI KAISHA
18919944 FRAMEWORK FOR ASYMMETRIC PRIVATE SET INTERSECTION MATCHING Non-Final OA Beijing Zitiao Network Technology Co., Ltd.
18316801 PHYSICAL AUTHENTICATION FOR CERTIFICATE THEFT DETECTION Final Rejection QUALCOMM Incorporated
18950020 CONTROLLED APPLICATION SHARING IN A VIDEO CONFERENCING SYSTEM Non-Final OA International Business Machines Corporation
18780286 SECURE TRANSACTIONS WITH AMBIENT WIRELESS DEVICES OVER THE INTERNET Final Rejection Cypress Semiconductor Corporation
18881635 INTRUSION DETECTION DEVICE AND INTRUSION DETECTION METHOD Final Rejection HITACHI ASTEMO, LTD.

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Frequently Asked Questions

What is examiner Chi D Nguy's allowance rate?

75.3% of resolved applications examined by Chi D Nguy were allowed (515 resolved cases), compared with 76.5% across Art Unit 2431 over the last five years.

Does an interview help with examiner Chi D Nguy?

This examiner's interview lift is +15.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Chi D Nguy take to allow a patent?

Applications allowed by Chi D Nguy took 1,261 days on average from filing to allowance.

Which art unit does examiner Chi D Nguy work in?

Chi D Nguy examines applications in Art Unit 2431 in Tech Center 2400 (Networking & Security).

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