Prosecution Insights
Last updated: October 25, 2026

Susan Dang Leong, USPTO Patent Examiner

Listed by the USPTO as LEONG, SUSAN DANG

Tech Center 4100 • Art Units: 1700 1721 1724 1725 1754 1756 1795 4100 4141

This examiner grants 64% of resolved cases

Analysis

LEONG, SUSAN DANG is associated with Tech Center 4100 and Art Unit 1700. The profile records 546 resolved cases, a 63.7% allowance rate, and a 39.1% interview lift. The median time to allowance is 1156 days. The interview measure is a prominent feature of this record, showing a substantial reported association with allowance outcomes within a meaningful case base.

The listed companies are UBE Corporation and Lilium Eaircraft GmbH. The listed firms are FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER and OBLON, MCCLELLAND, MAIER & NEUSTADT, L.L.P. Practitioners may place significant emphasis on interview preparation, including defined claim distinctions and supporting technical explanations. The allowance rate indicates that successful outcomes occur but are not automatic. The median duration should be included in prosecution planning for applicants managing timing, cost, and continuation decisions.

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

Performance Statistics

63.7%
Allow Rate
+3.7% vs TC avg
554
Total Applications
+39.1%
Interview Lift
1156
Avg Prosecution Days
Based on 546 resolved cases, 2023–2026

Rejection Statute Breakdown

1.0%
§101 Eligibility
13.1%
§102 Novelty
53.0%
§103 Obviousness
23.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18553451 TITANIUM-CONTAINING OXIDE POWDER, NEGATIVE ELECTRODE ACTIVE MATERIAL COMPOSITION USING SAME, AND ALL-SOLID-STATE SECONDARY BATTERY Non-Final OA UBE Corporation
17993104 LAMINATED FILM FOR PACKAGING OF POUCH-TYPE BATTERY CELLS, POUCH-TYPE BATTERY CELL AND BATTERY Final Rejection Lilium eAircraft GmbH

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Frequently Asked Questions

What is examiner Susan Dang Leong's allowance rate?

63.7% of resolved applications examined by Susan Dang Leong were allowed (546 resolved cases), compared with 40.4% across Art Unit 1700 over the last five years.

Does an interview help with examiner Susan Dang Leong?

This examiner's interview lift is +39.1 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Susan Dang Leong take to allow a patent?

Applications allowed by Susan Dang Leong took 1,156 days on average from filing to allowance.

Which art unit does examiner Susan Dang Leong work in?

Susan Dang Leong examines applications in Art Unit 1700 in Tech Center 4100.

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