Prosecution Insights
Last updated: October 26, 2026

Sun M Li, USPTO Patent Examiner

Listed by the USPTO as LI, SUN M

Tech Center 3700 • Art Units: 2121 3622 3626 3681 3682 3684 3685 3792

This examiner grants 54% of resolved cases

Analysis

LI, SUN M is assigned to Tech Center 3700 and Art Unit 2121. The profile records 759 resolved cases, a 53.5% allowance rate, and a median of 1470 days to allowance. Interviews show a 27.3% lift, making direct discussion a potentially useful part of prosecution strategy where counsel can present focused distinctions.

The principal companies are NEC Corporation, NEC Solution Innovators Ltd., and Sony Group Corporation. The leading firms are Barron & Young PLLC, BUCHANAN, INGERSOLL & ROONEY PC, and CHIP LAW GROUP. The allowance rate and extended median timing support early planning for multiple prosecution steps, with interviews coordinated to substantive claim issues.

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

Performance Statistics

53.5%
Allow Rate
-16.5% vs TC avg
786
Total Applications
+27.3%
Interview Lift
1470
Avg Prosecution Days
Based on 759 resolved cases, 2023–2026

Rejection Statute Breakdown

35.5%
§101 Eligibility
18.1%
§102 Novelty
31.2%
§103 Obviousness
11.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18364078 CHRONIC PULMONARY DISEASE PREDICTION FROM AUDIO INPUT BASED ON SHORT-WINDED BREATH DETERMINATION USING ARTIFICIAL INTELLIGENCE Non-Final OA SONY GROUP CORPORATION
19299648 INFORMATION PROCESSING METHOD Non-Final OA NEC Corporation
19298520 INFORMATION PROCESSING METHOD Non-Final OA NEC Corporation
19298633 INFORMATION PROCESSING METHOD Non-Final OA NEC Corporation
18275571 SAMPLE COLLECTION CALL TIME PREDICTION SYSTEM AND METHOD Final Rejection HITACHI HIGH-TECH CORPORATION
18246372 METHOD AND SYSTEM FOR EARLY EFFICIENT DETECTION OF CO-EVOLUTIONARY SITES IN EVOLVING BIO-NETWORKS Non-Final OA UNIVERSITY OF VIRGINIA PATENT FOUNDATION
18560148 Antibody Production Assisting Method and Antibody Production Assisting Program Non-Final OA SHIMADZU CORPORATION
18855003 SYSTEM AND METHOD FOR IDENTIFICATION OF SURGICAL WORKFLOW OUTLIERS Non-Final OA DIGITAL SURGERY LIMITED

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Frequently Asked Questions

What is examiner Sun M Li's allowance rate?

53.5% of resolved applications examined by Sun M Li were allowed (759 resolved cases), compared with 32.0% across Art Unit 2121 over the last five years.

Does an interview help with examiner Sun M Li?

This examiner's interview lift is +27.3 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Sun M Li take to allow a patent?

Applications allowed by Sun M Li took 1,470 days on average from filing to allowance.

Which art unit does examiner Sun M Li work in?

Sun M Li examines applications in Art Unit 2121 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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