Prosecution Insights
Last updated: October 26, 2026

Charles J Han, USPTO Patent Examiner

Listed by the USPTO as HAN, CHARLES J

Tech Center 3600 • Art Units: 3662 3665

This examiner grants 69% of resolved cases

Analysis

HAN, CHARLES J has resolved 451 cases in Tech Center 3600 and Art Unit 3662. The allowance rate is 69.4%, and the median time to allowance is 1173 days. The record provides a substantial basis for prosecution planning, with timing that should be considered when coordinating filing, response, and commercialization decisions.

The interview lift is 41.4%, showing a meaningful measured association with allowance. An interview may be useful when claim distinctions or technical context are difficult to convey through written argument alone. The listed companies are Toyota Motor Corporation, ABB Schweiz AG, and Bayerische Motoren Werke Aktiengesellschaft. The principal firms are Crowell, CROWELL & MORING LLP, and HUSCH BLACKWELL LLP.

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

Performance Statistics

69.4%
Allow Rate
+17.4% vs TC avg
466
Total Applications
+41.4%
Interview Lift
1173
Avg Prosecution Days
Based on 451 resolved cases, 2023–2026

Rejection Statute Breakdown

6.3%
§101 Eligibility
18.9%
§102 Novelty
40.7%
§103 Obviousness
32.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18760454 INFORMATION PROCESSING DEVICE Non-Final OA TOYOTA JIDOSHA KABUSHIKI KAISHA
18585893 METHOD AND SYSTEM FOR DETERMINING A PRECISE VALUE OF AT LEAST ONE POSE PARAMETER OF AN EGO VESSEL Final Rejection ABB Schweiz AG
18742808 Control of a Safety Function of a Motor Vehicle Non-Final OA Bayerische Motoren Werke Aktiengesellschaft
18755240 SYSTEM AND METHOD FOR AUTOMATIC ATTENUATION OF ENTERTAINMENT AUDIO BASED ON BACKGROUND AUDIO Final Rejection Harman International Industries, Incorporated

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Frequently Asked Questions

What is examiner Charles J Han's allowance rate?

69.4% of resolved applications examined by Charles J Han were allowed (451 resolved cases), compared with 61.1% across Art Unit 3662 over the last five years.

Does an interview help with examiner Charles J Han?

This examiner's interview lift is +41.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Charles J Han take to allow a patent?

Applications allowed by Charles J Han took 1,173 days on average from filing to allowance.

Which art unit does examiner Charles J Han work in?

Charles J Han examines applications in Art Unit 3662 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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