Prosecution Insights
Last updated: October 27, 2026

Esther Ngun Hlei Ma Lian, USPTO Patent Examiner

Listed by the USPTO as LIAN, ESTHER NGUN HLEI MA

Tech Center 2800 • Art Units: 2847 2848

This examiner grants 100% of resolved cases

Analysis

Esther Ngun Hlei Ma Lian is an examiner in Tech Center 2800 and Art Unit 2847, with 34 resolved cases. The data shows a 100.0 percent allowance rate, indicating that every resolved case so far has resulted in a grant. The median days to allowance for these cases is 828, which suggests a relatively efficient path to patent issuance.

The interview lift is 0.0 percent, implying that the high 100.0 percent allowance rate is achieved through the standard examination process for these 34 resolved cases. Practitioners should note that interviews have not been a factor in securing grants to date. Top companies include Samsung Electro-Mechanics Co., Ltd. and Murata Manufacturing Co., Ltd.

Morgan, Lewis & Bockius LLP (WA) is the top firm listed for this examiner, providing a point of contact for historical representation. The 828 median days to allowance provides a useful benchmark for applicants seeking a grant in this docket. These metrics offer a clear view of the examiner's performance and the typical timeline in Art Unit 2847.

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

Performance Statistics

100.0%
Allow Rate
+32.0% vs TC avg
44
Total Applications
+0.0%
Interview Lift
828
Avg Prosecution Days
Based on 34 resolved cases, 2023–2026

Rejection Statute Breakdown

0%
§101 Eligibility
29.6%
§102 Novelty
60.2%
§103 Obviousness
6.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18802017 MULTILAYER CERAMIC CAPACITOR Non-Final OA Murata Manufacturing Co., Ltd.
18936538 MULTILAYER ELECTRONIC COMPONENT Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18899146 MULTILAYER ELECTRONIC COMPONENT Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18782485 MULTILAYER ELECTRONIC COMPONENT Final Rejection SAMSUNG ELECTRO-MECHANICS CO., LTD.
18737478 CAPACITOR Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.
18372871 MULTILAYER ELECTRONIC COMPONENT Non-Final OA SAMSUNG ELECTRO-MECHANICS CO., LTD.

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Esther Ngun Hlei Ma Lian's allowance rate?

100.0% of resolved applications examined by Esther Ngun Hlei Ma Lian were allowed (34 resolved cases), compared with 68.1% across Art Unit 2847 over the last five years.

Does an interview help with examiner Esther Ngun Hlei Ma Lian?

This examiner's interview lift is +0.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Esther Ngun Hlei Ma Lian take to allow a patent?

Applications allowed by Esther Ngun Hlei Ma Lian took 828 days on average from filing to allowance.

Which art unit does examiner Esther Ngun Hlei Ma Lian work in?

Esther Ngun Hlei Ma Lian examines applications in Art Unit 2847 in Tech Center 2800 (Semiconductors, Circuits & Optics).

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month