Prosecution Insights
Last updated: August 18, 2026

Examiner: CHANG, HANWAY

Tech Center 2800 • Art Units: 2872 2878 2881

This examiner grants 86% of resolved cases

Performance Statistics

85.8%
Allow Rate
+17.8% vs TC avg
695
Total Applications
+7.9%
Interview Lift
801
Avg Prosecution Days
Based on 664 resolved cases, 2023–2026

Rejection Statute Breakdown

2.1%
§101 Eligibility
33.3%
§102 Novelty
41.7%
§103 Obviousness
5.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18776833 METHOD AND APPARATUS FOR MITIGATING CONTAMINATION Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18753674 ION EXTRACTION OPTICS WITH DYNAMIC EXTRACTION ANGLE CONTROL Non-Final OA Applied Materials, Inc.
18626895 Semiconductor Processing System with Horizontal Scan Non-Final OA Applied Materials, Inc.
18526286 DEVICES AND SYSTEMS FOR SPATIAL SUBTRACTION OF ELECTRON BACKSCATTER DIFFRACTION PATTERNS Non-Final OA Katholieke Universiteit Leuven
17891961 INSPECTION APPARATUS Final Rejection ASML Netherlands B.V.
18556200 POWER SUPPLY Non-Final OA DH Technologies Development Pte. Ltd.
18391947 COMPOSITIONAL MAPPING EMPLOYING VARIABLE CHARGED PARTICLE BEAM PARAMETERS FOR IMAGING AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY Non-Final OA FEI COMPANY
18509205 IN-VACUUM CHAMBER CONTROLLED-GAS-FILM DEVICE TO REDUCE LASER ABLATION REDEPOSITS Final Rejection FEI Company
18482093 MULTI CHARGED PARTICLE BEAM WRITING APPARATUS Final Rejection NuFlare Technology, Inc.

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