Prosecution Insights
Last updated: October 27, 2026

Jay C Chang, USPTO Patent Examiner

Listed by the USPTO as CHANG, JAY C

Tech Center 2800 • Art Units: 2800 2815 2817 2895

This examiner grants 85% of resolved cases

Analysis

CHANG, JAY C works in tech center 2800 and art unit 2800, with 686 resolved cases. The profile shows an 85.4% allowance rate and a median of 836 days to allowance. That combination indicates a prosecution record with frequent allowances alongside a substantial timeline to disposition.

Interviews correspond with a 13.9% lift in the allowance rate, giving applicants a measurable reason to consider examiner interviews when developing prosecution strategy. The listed company activity includes Taiwan Semiconductor Manufacturing Company, Samsung Electronics, and Samsung Display. Frequently appearing firms are CKC & Partners, Morgan, Lewis & Bockius, and Anova Law Group. Practitioners can use this combination of examiner-specific outcomes and recurring participants to tailor claim presentation and interview planning.

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

Performance Statistics

85.4%
Allow Rate
+17.4% vs TC avg
723
Total Applications
+13.9%
Interview Lift
836
Avg Prosecution Days
Based on 686 resolved cases, 2023–2026

Rejection Statute Breakdown

0.6%
§101 Eligibility
28.1%
§102 Novelty
42.2%
§103 Obviousness
27.2%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18779524 SEMICONDUCTOR PACKAGE Non-Final OA Samsung Electronics Co., Ltd.
18742833 SEMICONDUCTOR PACKAGE Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
18612648 SEMICONDUCTOR PACKAGE Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
18516097 IMAGE SENSOR AND METHOD OF FABRICATING THE SAME Final Rejection SAMSUNG ELECTRONICS CO., LTD.
18741762 DISPLAY DEVICE Non-Final OA Samsung Display Co., LTD.
18618967 DISPLAY DEVICE Final Rejection Samsung Display Co., LTD.
18432506 MANUFACTURING METHOD AND TEST METHOD OF POWER MODULE Non-Final OA Kia Corporation
18595905 SEMICONDUCTOR DEVICE HAVING TAPERED METAL COATED SIDEWALLS Final Rejection Texas Instruments Incorporated
18735952 METAL VIA WITH DUAL PARTIAL LINER Non-Final OA International Business Machines Corporation
18746297 Die Package and Method of Manufacturing a Die Package Non-Final OA Infineon Technologies AG
18721379 NITRIDE SEMICONDUCTOR SUBSTRATE AND METHOD FOR PRODUCING SAME Non-Final OA SHIN-ETSU HANDOTAI CO., LTD.
18391015 BOTTOM-UP DIELECTRIC GAP-FILL FOR DEVICE ISOLATION DURING SOURCE/DRAIN EPITAXY IN CFET Final Rejection Applied Materials, Inc.
18783260 LEADFRAME-LESS LASER DIRECT STRUCTURING (LDS) PACKAGE Non-Final OA STMICROELECTRONICS S.r.l.
18774843 PACKAGE STRUCTURE Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18400104 THROUGH SUBSTRATE VIA WITH SPACED SHALLOW TRENCH ISOLATION Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18527714 SEMICONDUCTOR DEVICE AND METHODS OF FABRICATION THEREOF Non-Final OA TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
18786873 SEMICONDUCTOR DEVICE AND METHOD Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18786485 Semiconductor Package and Method of Manufacturing The Same Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18770750 Semiconductor Device and Method of Manufacture Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.

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Who Appears Before This Examiner

Top companies before this examiner

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Frequently Asked Questions

What is examiner Jay C Chang's allowance rate?

85.4% of resolved applications examined by Jay C Chang were allowed (686 resolved cases), compared with 69.7% across Art Unit 2800 over the last five years.

Does an interview help with examiner Jay C Chang?

This examiner's interview lift is +13.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Jay C Chang take to allow a patent?

Applications allowed by Jay C Chang took 836 days on average from filing to allowance.

Which art unit does examiner Jay C Chang work in?

Jay C Chang examines applications in Art Unit 2800 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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