Prosecution Insights
Last updated: October 27, 2026

Shuyi S Liu, USPTO Patent Examiner

Listed by the USPTO as LIU, SHUYI S

Tech Center 1700 • Art Units: 1774 1792

This examiner grants 73% of resolved cases

Analysis

LIU, SHUYI S is a USPTO patent examiner in Tech Center 1700 and Art Unit 1774. The record covers 485 resolved cases, with a 73.4% allowance rate and a median of 1154 days to allowance. The allowance figure indicates that most matters reached allowance, while the median timing reflects a prosecution process that can require sustained effort.

The interview lift is 25.8%, showing a meaningful association between interviews and allowance outcomes. The listed companies are Alfa Laval, Fiberlite Centrifuge, and Flottweg. The listed firms are Birch Stewart Kolasch & Birch, BakerHostetler, and Patent Portfolio Builders. Practitioners may use interviews to clarify technical issues before making focused claim amendments.

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

Performance Statistics

73.4%
Allow Rate
+8.4% vs TC avg
530
Total Applications
+25.8%
Interview Lift
1154
Avg Prosecution Days
Based on 485 resolved cases, 2023–2026

Rejection Statute Breakdown

0.6%
§101 Eligibility
15.4%
§102 Novelty
47.3%
§103 Obviousness
35.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17897355 Magnetic Bead Separation Method, Magnetic Bead Separation Device, And Sample Tube Final Rejection SEIKO EPSON CORPORATION
18287304 METHOD AND SET FOR PRODUCING A ZINC-MANGANESE DIOXIDE CELL, AND CELL PRODUCED USING SAID METHOD Non-Final OA VARTA MICROBATTERY GMBH

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Frequently Asked Questions

What is examiner Shuyi S Liu's allowance rate?

73.4% of resolved applications examined by Shuyi S Liu were allowed (485 resolved cases), compared with 58.5% across Art Unit 1774 over the last five years.

Does an interview help with examiner Shuyi S Liu?

This examiner's interview lift is +25.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Shuyi S Liu take to allow a patent?

Applications allowed by Shuyi S Liu took 1,154 days on average from filing to allowance.

Which art unit does examiner Shuyi S Liu work in?

Shuyi S Liu examines applications in Art Unit 1774 in Tech Center 1700 (Chemistry & Materials).

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