Prosecution Insights
Last updated: October 26, 2026

Huo Long Chen, USPTO Patent Examiner

Listed by the USPTO as CHEN, HUO LONG

Tech Center 2600 • Art Units: 2625 2674 2676 2681 2682

This examiner grants 54% of resolved cases

Analysis

CHEN, HUO LONG is a USPTO patent examiner in tech center 2600 and art unit 2625. The profile covers 611 resolved cases, with an allowance rate of 53.8% and a median of 1220 days to allowance. The interview lift is 30.0%, indicating a positive association between interviews and allowance outcomes in the available record.

The listed companies are Canon Inc., Konica Minolta Inc., and Kyocera Document Solutions Inc. The listed firms are Venable LLP, BakerHostetler, and CANTOR COLBURN LLP. The substantial case history supports using the profile for examiner-specific planning, including attention to interview timing and the extended median path to allowance.

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

Performance Statistics

53.8%
Allow Rate
-8.2% vs TC avg
654
Total Applications
+30.0%
Interview Lift
1220
Avg Prosecution Days
Based on 611 resolved cases, 2023–2026

Rejection Statute Breakdown

9.2%
§101 Eligibility
11.8%
§102 Novelty
68.5%
§103 Obviousness
7.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18901303 PRINT SYSTEM AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM THEREFOR Non-Final OA BROTHER KOGYO KABUSHIKI KAISHA
19049874 CONTROL METHOD AND INFORMATION PROCESSING APPARATUS Non-Final OA CANON KABUSHIKI KAISHA
19015971 DIAGNOSTIC APPARATUS, CONTROL METHOD FOR THE SAME, STORAGE MEDIUM, AND IMAGE FORMING APPARATUS Non-Final OA CANON KABUSHIKI KAISHA
18894488 INFORMATION PROCESSING APPARATUS, METHOD OF CONTROLLING INFORMATION PROCESSING APPARATUS, AND STORAGE MEDIUM Non-Final OA CANON KABUSHIKI KAISHA
18887226 INFORMATION PROCESSING APPARATUS, PRINTING SYSTEM, STORAGE MEDIUM, AND METHOD OF CONTROLLING INFORMATION PROCESSING APPARATUS Non-Final OA CANON KABUSHIKI KAISHA
19025105 IMAGE READING APPARATUS Non-Final OA SEIKO EPSON CORPORATION
18729113 IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND STORAGE MEDIUM Non-Final OA NEC Corporation
19010854 IMAGE READING DEVICE AND IMAGE FORMING APPARATUS THEREWITH Non-Final OA KYOCERA Document Solutions Inc.
18947966 METHODS AND PRINTING SYSTEM USING RASTER IMAGE PROCESSORS CONFIGURED FOR PROCESSING A JOB Non-Final OA Kyocera Document Solutions Inc.
18217497 SUBTITLE POSITIONING BASED ON SALIENCY DETECTION Final Rejection Intel Corporation
18944488 PRINTING SYSTEM, PRINTING CONTROL APPARATUS, PRINTING CONTROL METHOD, AND RECORDING MEDIUM Non-Final OA RICOH COMPANY, LTD.
18397174 3D OBJECT DETECTION USING TEMPORAL INPUTS Final Rejection NVIDIA Corporation
17751322 PROCESSING FRAMEWORK FOR TEMPORAL-CONSISTENT FACE MANIPULATION IN VIDEOS Non-Final OA Adobe Inc.

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Frequently Asked Questions

What is examiner Huo Long Chen's allowance rate?

53.8% of resolved applications examined by Huo Long Chen were allowed (611 resolved cases), compared with 66.5% across Art Unit 2625 over the last five years.

Does an interview help with examiner Huo Long Chen?

This examiner's interview lift is +30.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Huo Long Chen take to allow a patent?

Applications allowed by Huo Long Chen took 1,220 days on average from filing to allowance.

Which art unit does examiner Huo Long Chen work in?

Huo Long Chen examines applications in Art Unit 2625 in Tech Center 2600 (Communications).

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