Prosecution Insights
Last updated: October 26, 2026

Cheung Lee, USPTO Patent Examiner

Listed by the USPTO as LEE, CHEUNG

Tech Center 2800 • Art Units: 2812 2826 2874 2896

This examiner grants 92% of resolved cases

Analysis

LEE, CHEUNG has 1172 resolved cases and a 92.2% allowance rate. The interview lift is 4.2%, and the median time to allowance is 665 days. The profile identifies Tech Center 2800 and Art Unit 2812. The 92.2% allowance rate is the defining outcome measure, while the 4.2% interview lift indicates a smaller measured effect from interviews. The 665-day median provides a relatively short timing reference within this record and may affect continuation planning.

The primary companies are Taiwan Semiconductor Manufacturing Company, Ltd., Intel Corporation, and United Microelectronics Corp. The leading firms are Haynes and Boone, LLP (24061), THE MARBURY LAW GROUP, PLLC, and JCIPRNET. Practitioners can use the recurring semiconductor applicants and counsel to anticipate the technical setting of matters assigned to this examiner.

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

Performance Statistics

92.2%
Allow Rate
+24.2% vs TC avg
1,185
Total Applications
+4.2%
Interview Lift
665
Avg Prosecution Days
Based on 1172 resolved cases, 2023–2026

Rejection Statute Breakdown

1.9%
§101 Eligibility
31.4%
§102 Novelty
42.7%
§103 Obviousness
13.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18774351 BACKSIDE CONTACTS FOR SEMICONDUCTOR DEVICES Non-Final OA Intel Corporation
18759006 METHOD OF MANUFACTURING A SEMICONDUCTOR DEVICE AND A SEMICONDUCTOR DEVICE Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18753024 SEMICONDUCTOR DEVICE WITH GATE CUT FEATURE AND METHOD FOR FORMING THE SAME Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18420674 PHOTONIC DEVICE AND FABRICATING METHOD THEREOF Non-Final OA Taiwan Semiconductor Manufacturing Company, Ltd.
18784531 SEMICONDUCTOR DEVICE WITH S/D BOTTOM ISOLATION AND METHODS OF FORMING THE SAME Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18780834 GRAPHENE-ASSISTED LOW-RESISTANCE INTERCONNECT STRUCTURES AND METHODS OF FORMATION THEREOF Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18770349 SEMICONDUCTOR DEVICE WITH FUNNEL SHAPE SPACER AND METHODS OF FORMING THE SAME Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18769875 FINFETS WITH EPITAXY REGIONS HAVING MIXED WAVY AND NON-WAVY PORTIONS Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18629037 MEMORY DEVICE INCLUDING MULTIPLICATE SOURCE LINES AND METHODS OF FORMING THE SAME Non-Final OA Taiwan Semiconductor Manufacturing Company Limited
18596501 VERTICAL HETEROSTRUCTURE SEMICONDUCTOR MEMORY CELL AND METHODS FOR MAKING THE SAME Non-Final OA Taiwan Semiconductor Manufacturing Company Limited

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Who Appears Before This Examiner

Top companies before this examiner

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Frequently Asked Questions

What is examiner Cheung Lee's allowance rate?

92.2% of resolved applications examined by Cheung Lee were allowed (1,172 resolved cases), compared with 82.1% across Art Unit 2812 over the last five years.

Does an interview help with examiner Cheung Lee?

This examiner's interview lift is +4.2 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Cheung Lee take to allow a patent?

Applications allowed by Cheung Lee took 665 days on average from filing to allowance.

Which art unit does examiner Cheung Lee work in?

Cheung Lee examines applications in Art Unit 2812 in Tech Center 2800 (Semiconductors, Circuits & Optics).

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