Prosecution Insights
Last updated: October 26, 2026

Henry Y Liu, USPTO Patent Examiner

Listed by the USPTO as LIU, HENRY Y

Tech Center 4100 • Art Units: 1745 3654 3657 4100

This examiner grants 76% of resolved cases

Analysis

LIU, HENRY Y is a USPTO patent examiner in Tech Center 4100 and Art Unit 1745. The record covers 1340 resolved cases, with a 75.7% allowance rate and a median of 987 days to allowance. The large record indicates that allowed outcomes are common, while the median timing shows that prosecution generally requires more than an initial examination exchange.

The interview lift is 13.0%, reflecting a positive association between interviews and allowance outcomes. The listed companies are Bombardier Recreational Products, Shenzhen Yinwang Intelligent Technology, and Carrier. The listed firms are Banner & Witcoff, Brooks Kushman, and Calfee Halter & Griswold. Applicants may use interviews to refine claim distinctions while maintaining disciplined written prosecution.

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

Performance Statistics

75.7%
Allow Rate
+15.7% vs TC avg
1,361
Total Applications
+13.0%
Interview Lift
987
Avg Prosecution Days
Based on 1340 resolved cases, 2023–2026

Rejection Statute Breakdown

0.5%
§101 Eligibility
27.2%
§102 Novelty
49.7%
§103 Obviousness
12.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19036357 TENSIONER SYSTEM FOR FLEXIBLE DRIVE MEMBER Non-Final OA BOMBARDIER RECREATIONAL PRODUCTS INC.
19109136 ARTICLE, IN PARTICULAR DRIVE BELT, WITH A TEXTILE COVERING Non-Final OA ContiTech Deutschland GmbH
19102035 DRIVE BELT Non-Final OA ContiTech Deutschland GmbH
19176621 CONTROL METHOD AND CONTROL DEVICE FOR COMPRESSOR UNIT Final Rejection Carrier Corporation
18795503 SEALED SELF-LUBRICATING ROLLER CHAIN Non-Final OA AKTIEBOLAGET SKF
19113282 POWER TRANSMISSION BELTS WITH ALIGNED REINFORCEMENT ELEMENTS Non-Final OA GATES CORPORATION
19006407 FASTENER STRUCTURALLY CONFIGURED TO SECURE AN ELECTRONIC COMPONENT IN AN ENCLOSURE QUICKLY WITHOUT USING TOOLS TO ENHANCE EFFICIENCY AND SIMPLICITY Non-Final OA PPC BROADBAND, INC.

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Frequently Asked Questions

What is examiner Henry Y Liu's allowance rate?

75.7% of resolved applications examined by Henry Y Liu were allowed (1,340 resolved cases), compared with 56.6% across Art Unit 1745 over the last five years.

Does an interview help with examiner Henry Y Liu?

This examiner's interview lift is +13.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Henry Y Liu take to allow a patent?

Applications allowed by Henry Y Liu took 987 days on average from filing to allowance.

Which art unit does examiner Henry Y Liu work in?

Henry Y Liu examines applications in Art Unit 1745 in Tech Center 4100.

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