Prosecution Insights
Last updated: October 27, 2026

Derek Lang Nielsen, USPTO Patent Examiner

Listed by the USPTO as NIELSEN, DEREK LANG

Tech Center 4100 • Art Units: 2899 4100

This examiner grants 70% of resolved cases

Analysis

NIELSEN, DEREK LANG works in tech center 4100 and art unit 2899. The record includes 67 resolved cases, an allowance rate of 70.1%, and a median of 1309 days to allowance. Interview lift is 40.0%, indicating a strong association between interviews and allowance outcomes in this limited record.

The leading companies are Taiwan Semiconductor Manufacturing Company, Ltd., Samsung Electronics Co., Ltd., and Intel Corporation. The listed firms are JCIPRNET, VOLPE KOENIG, and AGORA LAW GROUP, PLLC. Because the case volume is 67 resolved cases, practitioners should use the figures as a targeted reference. The positive interview measure supports preparing a clear interview agenda when prosecution issues are suitable for direct discussion.

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

Performance Statistics

70.1%
Allow Rate
+10.1% vs TC avg
88
Total Applications
+40.0%
Interview Lift
1309
Avg Prosecution Days
Based on 67 resolved cases, 2023–2026

Rejection Statute Breakdown

0.7%
§101 Eligibility
15.8%
§102 Novelty
68.7%
§103 Obviousness
14.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18665324 SEMICONDUCTOR STRUCTURE, SEMICONDUCTOR CHIP INCLUDING SEMICONDUCTOR STRUCTURE AND METHOD FOR MANUFACTURING SEMICONDUCTOR STRUCTURE Non-Final OA Samsung Electronics Co., Ltd.
18612672 METHOD OF MANUFACTURING SEMICONDUCTOR DEVICES Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
17891738 THERMAL MANAGEMENT OF BASE DIES IN MULTICHIP COMPOSITE DEVICES Non-Final OA Intel Corporation
18319551 THREE-DIMENSIONAL INTEGRATED CIRCUIT (3DIC) SYSTEMS WITH A HEAT SPREADER CONFIGURED AS A BACKSIDE POWER PLANE Final Rejection Microsoft Technology Licensing, LLC
18812031 SEMICONDUCTOR DEVICE Non-Final OA SUMITOMO ELECTRIC DEVICE INNOVATIONS, INC.
18513765 BACKSIDE CONTACT CAP AND SPACER FOR BACKSIDE SIGNAL CONTACT ISOLATION Non-Final OA INTERNATIONAL BUSINESS MACHINES CORPORATION
18784860 METHODS FOR MANUFACTURING SEMICONDUCTOR STRUCTURE Non-Final OA TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
18784297 ONE-TIME-PROGRAMMABLE DEVICE STRUCTURE Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
17726494 FLIP-CHIP BONDING APPARATUS AND METHOD OF USING THE SAME Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18621292 METHOD OF PROCESSING SUBSTRATE, METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE, SUBSTRATE PROCESSING APPARATUS, AND RECORDING MEDIUM Non-Final OA Kokusai Electric Corporation
18702727 THREE-DIMENSIONAL MEMORY ARRAY AND METHOD FOR MANUFACTURING SAME Non-Final OA IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
18473878 VERTICALLY CONDUCTIVE SEMICONDUCTOR STRUCTURES AND MANUFACTURING METHODS THEREFOR Final Rejection ENKRIS SEMICONDUCTOR, INC.

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Frequently Asked Questions

What is examiner Derek Lang Nielsen's allowance rate?

70.1% of resolved applications examined by Derek Lang Nielsen were allowed (67 resolved cases), compared with 81.9% across Art Unit 2899 over the last five years.

Does an interview help with examiner Derek Lang Nielsen?

This examiner's interview lift is +40.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Derek Lang Nielsen take to allow a patent?

Applications allowed by Derek Lang Nielsen took 1,309 days on average from filing to allowance.

Which art unit does examiner Derek Lang Nielsen work in?

Derek Lang Nielsen examines applications in Art Unit 2899 in Tech Center 4100.

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