Prosecution Insights
Last updated: October 26, 2026

Brian Ngo, USPTO Patent Examiner

Listed by the USPTO as NGO, BRIAN

Tech Center 4100 • Art Units: 2825 2851 4100

This examiner grants 88% of resolved cases

Analysis

Brian Ngo is an examiner in Tech Center 4100 with 989 resolved cases. The examiner maintains an allowance rate of 87.8 percent in Art Unit 2825. This rate suggests a favorable environment for major filers like International Business Machines Corporation and Samsung Electronics Co., Ltd.

The interview lift is 12.7 percent. This figure indicates that even with an 87.8 percent baseline allowance rate, interviews still provide a benefit in securing a grant. Firms such as Harrity & Harrity, LLP and DORITY & MANNING, P.A. can use interviews to resolve remaining issues and potentially move applications toward a resolution more quickly.

The median days to allowance is 799. This duration indicates an efficient path to allowance for successful applications from entities like Siemens Aktiengesellschaft and HARNESS, DICKEY & PIERCE, P.L.C. Practitioners can use this 799-day benchmark to forecast the length of the prosecution cycle. The data from the 989 resolved cases points to a streamlined and successful experience for applicants.

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

Performance Statistics

87.8%
Allow Rate
+27.8% vs TC avg
1,002
Total Applications
+12.7%
Interview Lift
799
Avg Prosecution Days
Based on 989 resolved cases, 2023–2026

Rejection Statute Breakdown

19.5%
§101 Eligibility
34.3%
§102 Novelty
36.4%
§103 Obviousness
7.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18475362 ADAPTIVE TARGET CONTROL FOR CURVILINEAR OPTICAL PROXIMITY CORRECTION (OPC) Non-Final OA Siemens Industry Software Inc.
17800171 SYSTEMS AND METHODS FOR PERFORMING OPTICAL IMAGING USING DUO-SPOT POINT SPREAD FUNCTIONS Final Rejection Washington University
18211520 SCALABLE-LOGIC COVERAGE EVALUATION OF VERIFICATION TESTBENCHES Final Rejection International Business Machines Corporation

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Frequently Asked Questions

What is examiner Brian Ngo's allowance rate?

87.8% of resolved applications examined by Brian Ngo were allowed (989 resolved cases), compared with 81.3% across Art Unit 2825 over the last five years.

Does an interview help with examiner Brian Ngo?

This examiner's interview lift is +12.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Brian Ngo take to allow a patent?

Applications allowed by Brian Ngo took 799 days on average from filing to allowance.

Which art unit does examiner Brian Ngo work in?

Brian Ngo examines applications in Art Unit 2825 in Tech Center 4100.

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