Prosecution Insights
Last updated: October 26, 2026

Sukwoo James Chang, USPTO Patent Examiner

Listed by the USPTO as CHANG, SUKWOO JAMES

Tech Center 3700 • Art Units: 1718 3647 3723 3745 3799

This examiner grants 58% of resolved cases

Analysis

CHANG, SUKWOO JAMES is assigned to tech center 3700 and art unit 1718, with 119 resolved cases. The profile shows a 58.0% allowance rate and a median of 1066 days to allowance. The case volume is smaller than a large established docket, so the figures are useful as directional indicators rather than a complete picture of prosecution behavior.

The interview lift is 41.8%, indicating a strong association between interviews and allowance outcomes in the recorded matters. Listed companies include Ebara, Irobot, and Taiwan Semiconductor Manufacturing Company. The leading firms are Maschoff Brennan Gilmore Israelsen & Mauriel, BakerHostetler, and JCIPRNET. Counsel may therefore give particular attention to interview timing and preparation while maintaining a careful written record.

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

Performance Statistics

58.0%
Allow Rate
-12.0% vs TC avg
201
Total Applications
+41.8%
Interview Lift
1066
Avg Prosecution Days
Based on 119 resolved cases, 2023–2026

Rejection Statute Breakdown

1.7%
§101 Eligibility
19.1%
§102 Novelty
53.7%
§103 Obviousness
22.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18427486 CHEMICAL MECHANICAL POLISHING (CMP) APPARATUS Final Rejection Samsung Electronics Co., Ltd.
18732951 Handheld power tool, in particular a sander, handheld power tool device, protective device, handheld power tool system, and method for manufacturing a handheld power tool device Non-Final OA Robert Bosch GmbH
17902222 Blower With Electrostatic Discharge System Final Rejection Black & Decker, Inc.
17952575 BOARDING SWEEPER Final Rejection HONDA MOTOR CO., LTD.
18215324 DEVICE BASE, WATER STORAGE DEVICE AND CLEANING ROBOT Non-Final OA BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
18725438 SELF-CLEANING DUST COLLECTION HOLDER, AND DUST COLLECTION SYSTEM Non-Final OA Beijing Roborock Technology Co., Ltd.
18417304 APPARATUS AND METHOD FOR CMP TEMPERATURE CONTROL Final Rejection Applied Materials, Inc.
18182406 WAFER POLISHING HEAD, SYSTEM THEREOF, AND METHOD USING THE SAME Non-Final OA TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
16549153 Novel CMP Pad Design and Method of Using the Same Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18359180 Novel CMP Pad Design and Method of Using the Same Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18982346 SUBSTRATE POLISHING APPARATUS AND SUBSTRATE POLISHING METHOD Final Rejection EBARA CORPORATION
18475188 POLISHING APPARATUS Non-Final OA EBARA CORPORATION
18237263 POLISHING HEAD SYSTEM AND POLISHING METHOD Non-Final OA EBARA CORPORATION
18223326 POLISHING METHOD AND POLISHING APPARATUS Non-Final OA EBARA CORPORATION
18075439 SUBSTRATE CLEANING DEVICE AND SUBSTRATE POLISHING DEVICE Non-Final OA EBARA CORPORATION
18363939 WORKPIECE PROCESSING METHOD Final Rejection DISCO CORPORATION

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Frequently Asked Questions

What is examiner Sukwoo James Chang's allowance rate?

58.0% of resolved applications examined by Sukwoo James Chang were allowed (119 resolved cases), compared with 35.5% across Art Unit 1718 over the last five years.

Does an interview help with examiner Sukwoo James Chang?

This examiner's interview lift is +41.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Sukwoo James Chang take to allow a patent?

Applications allowed by Sukwoo James Chang took 1,066 days on average from filing to allowance.

Which art unit does examiner Sukwoo James Chang work in?

Sukwoo James Chang examines applications in Art Unit 1718 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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