Prosecution Insights
Last updated: October 26, 2026

Li Liu, USPTO Patent Examiner

Listed by the USPTO as LIU, LI

Tech Center 2600 • Art Units: 2432 2613 2624 2634 2636 2665 2666

This examiner grants 80% of resolved cases

Analysis

Li Liu is an examiner in Tech Center 2600 and Art Unit 2432. The examiner has 1742 resolved cases. The data shows an allowance rate of 80.5 percent for these matters. This volume of cases provides a baseline for evaluating prosecution outcomes in this specific administrative unit.

The interview lift for this examiner is 16.7 percent. This figure is lower than the 80.5 percent allowance rate. The median days to allowance is 956. This timeline reflects the duration from filing to a successful outcome for the 1742 resolved cases. The 956 days to allowance represents the typical timeframe for reaching a grant in this art unit.

The examiner frequently interacts with major entities such as Nippon Telegraph and Telephone Corporation, Airbus SAS, and Apple Inc. Legal representation in these matters often involves firms like GREER, BURNS & CRAIN, LTD, HARNESS DICKEY (DETROIT), and ARENTFOX SCHIFF LLP - New York. These participants represent the primary corporate and legal environment for the examiner's work in Tech Center 2600.

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

Performance Statistics

80.5%
Allow Rate
+18.5% vs TC avg
1,764
Total Applications
+16.7%
Interview Lift
956
Avg Prosecution Days
Based on 1742 resolved cases, 2023–2026

Rejection Statute Breakdown

7.4%
§101 Eligibility
16.1%
§102 Novelty
46.0%
§103 Obviousness
23.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18308221 Electronic Device with Digital Frequency Discriminator for Wireless Communication Final Rejection Apple Inc.
19044071 AIRCRAFT AND VEHICLE TRANSCEIVERS Non-Final OA Airbus Operations Limited
19043809 FREE SPACE OPTICAL COMMUNICATION WITH AIRCRAFT Non-Final OA Airbus Operations Limited
19176779 OPTICAL WIRELESS COMMUNICATION SYSTEM AND RECEIVING DEVICE Non-Final OA TOYOTA JIDOSHA KABUSHIKI KAISHA
18620555 OPTICAL WIRELESS COMMUNICATION METHOD AND DEVICE Final Rejection HUAWEI TECHNOLOGIES CO., LTD.
19121680 COMMUNICATION APPARATUS, FREQUENCY OFFSET COMPENSATION METHOD AND PROGRAM Non-Final OA NTT, Inc.
19108383 CONTROL SYSTEM, CONTROL APPARATUS, NETWORK APPARATUS, CONTROL METHOD AND PROGRAM Non-Final OA NTT, Inc.
18567217 WIRELESS COMMUNICATION METHOD Final Rejection NTT, Inc.
18279524 STATE ESTIMATION SYSTEM, SECRET SIGNAL GENERATOR, STATE ESTIMATION METHOD, SECRET SIGNAL GENERATION PROGRAM Non-Final OA Nippon Telegraph and Telephone Corporation
18827372 LOW COMPLEXITY AND LOW LATENCY IMPLEMENTATION FOR CELLULAR FRONTHAULING Final Rejection Microsoft Technology Licensing, LLC

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Frequently Asked Questions

What is examiner Li Liu's allowance rate?

80.5% of resolved applications examined by Li Liu were allowed (1,742 resolved cases), compared with 73.0% across Art Unit 2432 over the last five years.

Does an interview help with examiner Li Liu?

This examiner's interview lift is +16.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Li Liu take to allow a patent?

Applications allowed by Li Liu took 956 days on average from filing to allowance.

Which art unit does examiner Li Liu work in?

Li Liu examines applications in Art Unit 2432 in Tech Center 2600 (Communications).

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