Prosecution Insights
Last updated: October 27, 2026

Dao H Nguyen, USPTO Patent Examiner

Listed by the USPTO as NGUYEN, DAO H

Tech Center 4100 • Art Units: 2818 4100

This examiner grants 91% of resolved cases

Analysis

NGUYEN, DAO H works in Technology Center 4100 and Art Unit 2818. The record includes 1276 resolved cases and an allowance rate of 91.4%, indicating a strong allowance profile across substantial activity. The median time to allowance is 713 days, providing an important timing reference for applicants coordinating prosecution with technical development or market plans.

The interview lift is 5.7%, showing a modest association with allowance outcomes. Practitioners may use interviews selectively for clarification, while emphasizing complete written responses and well-supported claim scope. The leading companies are Taiwan Semiconductor Manufacturing Company, Ltd., Samsung Electronics Co., Ltd., and LG Display Co., Ltd. The leading firms are Haynes and Boone, LLP (24061), JCIPRNET, and BIRCH STEWART KOLASCH & BIRCH, LLP.

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

Performance Statistics

91.4%
Allow Rate
+31.4% vs TC avg
1,317
Total Applications
+5.7%
Interview Lift
713
Avg Prosecution Days
Based on 1276 resolved cases, 2023–2026

Rejection Statute Breakdown

0.6%
§101 Eligibility
55.0%
§102 Novelty
35.0%
§103 Obviousness
6.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18800139 SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME Non-Final OA Samsung Electronics Co., Ltd.
18753484 SEMICONDUCTOR DEVICES Non-Final OA Samsung Electronics Co., Ltd.
18383404 ORGANIC LIGHT EMITTING DISPLAY APPARATUS Final Rejection LG Display Co., Ltd.
18673326 ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS Non-Final OA SEIKO EPSON CORPORATION
18324071 SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD THEREOF Non-Final OA HUAWEI TECHNOLOGIES CO., LTD.
18459664 INTEGRATED CIRCUIT DEVICES WITH BACKSIDE BIT LINES AND WORD LINES Non-Final OA Intel Corporation
18716457 Manufacturing method of a system in package having several layers and associated manufacturing installation Non-Final OA THALES
18324231 STRUCTURE AND METHOD FOR SEMICONDUCTOR PACKAGING Non-Final OA TEXAS INSTRUMENTS INCORPORATED
18701399 ENCLOSURE Non-Final OA Schott AG
18750465 SEMICONDUCTOR DEVICE WITH HIGH VOLTAGE TERMINATION Non-Final OA Infineon Technologies Austria AG
18776907 MEMORY DEVICE AND METHOD OF MANUFACTURING THE MEMORY DEVICE Non-Final OA SK hynix Inc.
18433234 TRENCH AND CHANNEL GAP FILL TUNING FOR FLOWABLE CHEMICAL VAPOR DEPOSITION (FCVD) FILMS Non-Final OA Applied Materials, Inc.
18779109 SEMICONDUCTOR PACKAGE AND MANUFACTURING METHOD THEREOF Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18769807 STACKED SEMICONDUCTOR STRUCTURE Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18770177 SEMICONDUCTOR DEVICE WITH BACKSIDE CONTACT AND METHODS OF FORMING SUCH Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18633920 SEMICONDUCTOR PACKAGE AND MANUFACTURING METHOD THEREOF Final Rejection Taiwan Semiconductor Manufacturing Company, Ltd.
18474606 THROUGH SILICON VIA WITH TEXTURED STRUCTURE AND FOOTING FEATURES Final Rejection Taiwan Semiconductor Manufacturing Company, Ltd.
18463062 HEAT SINK FOR STACKED MULTI-GATE DEVICE Final Rejection Taiwan Semiconductor Manufacturing Company, Ltd.
18895019 SEMICONDUCTOR PACKAGES AND THE MANUFACTURING PROCESSES THEREOF Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18773308 FIELD EFFECT TRANSISTOR WITH FIN ISOLATION STRUCTURE AND METHOD Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18768952 Semiconductor Device Structure With Uniform Threshold Voltage Distribution and Method of Forming the Same Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18666215 PRINTED CIRCUIT BOARD AND METHOD OF MANUFACTURING THE SAME Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18386456 THREE-DIMENSIONAL MEMORY DEVICE INCLUDING LOW-K DRAIN-SELECT-LEVEL ISOLATION STRUCTURES AND METHODS OF FORMING THE SAME Non-Final OA SANDISK TECHNOLOGIES LLC
18179858 LATERAL SILICON BRIDGE FOR STACKED DIES Final Rejection Advanced Micro Devices, Inc.

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Frequently Asked Questions

What is examiner Dao H Nguyen's allowance rate?

91.4% of resolved applications examined by Dao H Nguyen were allowed (1,276 resolved cases), compared with 85.2% across Art Unit 2818 over the last five years.

Does an interview help with examiner Dao H Nguyen?

This examiner's interview lift is +5.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Dao H Nguyen take to allow a patent?

Applications allowed by Dao H Nguyen took 713 days on average from filing to allowance.

Which art unit does examiner Dao H Nguyen work in?

Dao H Nguyen examines applications in Art Unit 2818 in Tech Center 4100.

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