Prosecution Insights
Last updated: October 02, 2026

Examiner: NGUYEN, SANG H

Tech Center 3700 • Art Units: 1792 2800 2877 2886 3791

This examiner grants 89% of resolved cases

Analysis

Sang H. Nguyen is an examiner in Tech Center 3700 and Art Unit 1792. His record includes 1474 resolved cases, providing a substantial dataset for analysis. The allowance rate for these cases is 88.7%. This 88.7% rate indicates the frequency with which applications reach a grant under his review. Practitioners can use this figure to assess the favorable prosecution environment when their cases are assigned to Art Unit 1792.

The median days to allowance is 727. This 727-day figure represents the middle point of the timeline for applications that result in a patent grant. It serves as a practical benchmark for managing expectations regarding the duration of the examination process. The 727-day median is a key metric for applicants to consider when planning their patent strategy and budgeting for prosecution costs in Tech Center 3700.

The data also shows an interview lift of 11.7%. This 11.7% lift represents the increase in the allowance rate associated with conducting an examiner interview. Practitioners should evaluate this 11.7% lift as a potential strategy for advancing prosecution. While the base allowance rate is 88.7%, the 11.7% lift suggests that direct communication can be a productive tool for resolving outstanding issues and securing a grant. This lift provides a measurable basis for deciding whether to engage in an interview.

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

Performance Statistics

88.7%
Allow Rate
+18.7% vs TC avg
1,492
Total Applications
+11.7%
Interview Lift
727
Avg Prosecution Days
Based on 1475 resolved cases, 2023–2026

Rejection Statute Breakdown

12.7%
§101 Eligibility
20.0%
§102 Novelty
45.5%
§103 Obviousness
13.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18774117 DEPOSITION APPARATUS, MASK FOR DEPOSITION APPARATUS, AND METHOD OF MEASURING GAP BETWEEN MASK FOR DEPOSITION APPARATUS AND SUBSTRATE Non-Final OA Samsung Display Co., LTD.
18961105 Apparatus, Methods and Systems for Fail Safe in Optical Coherence Tomography Non-Final OA Canon U.S.A., Inc.
18961284 INTRAORAL 3D SCANNER WITH HIGH GAIN FACTOR Non-Final OA Align Technology, Inc.
19114288 APPARATUS AND METHOD FOR OBTAINING MODE FIELD DIAMETER OF OPTICAL FIBER Final Rejection NTT. Inc.
18803041 MIRROR FOLDED ILLUMINATION FOR COMPACT OPTICAL METROLOGY SYSTEM Final Rejection Applied Materials, Inc.
19059830 NANOMETROLOGY DEVICE Non-Final OA NATIONAL UNIVERSITY OF SINGAPORE
19223062 METHOD AND SYSTEM FOR EXTRACTING INFORMATION FROM AN OPTICAL SIGNAL Non-Final OA Ariel Scientific Innovations Ltd.
19030721 MEDICAL TREATMENT SYSTEM AND METHODS USING A PLURALITY OF FLUID LINES Non-Final OA DEKA Products Limited Partnership
19000922 MEASURING ASSEMBLY FOR DETECTING A DISTANCE BETWEEN TWO ELEMENTS, DISTANCE MEASURING DEVICE, OPTICAL MEASURING SYSTEM AND METHOD Non-Final OA Carl Zeiss SMT GmbH
18867912 PARTICLE MEASURING DEVICE Non-Final OA DONGWOO FINE-CHEM CO., LTD.
18819148 FRUSTRATED TOTAL INTERNAL REFLECTION (FTIR) SURFACE TOPOGRAPHY AND COMPOSITION ANALYSIS SYSTEMS, METHODS, AND DEVICES Non-Final OA GS-HealthMatrix, LLC

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