Prosecution Insights
Last updated: October 27, 2026

Chieh M Fan, USPTO Patent Examiner

Listed by the USPTO as FAN, CHIEH M

Tech Center 2600 • Art Units: 2611 2631 2632 2647

This examiner grants 48% of resolved cases

Analysis

FAN, CHIEH M is assigned to technology center 2600 and art unit 2611. The record contains 33 resolved cases, with an allowance rate of 48.5%, an interview lift of 13.4%, and a median of 1035 days to allowance. The allowance result is below a majority, while the interview measure is positive but limited. The smaller case history calls for cautious use of the figures as a forecast.

The listed companies are Samsung Electronics Co., Ltd., Toyota Motor Corporation, and Qualcomm Incorporated. The associated firms are HARNESS DICKEY (DETROIT), Nixon & Vanderhye PC, and Ortiz & Lopez, PLLC. Practitioners should maintain disciplined claim analysis and preserve fallback positions. Interviews may assist with targeted clarification, but the data does not show a strong enough lift to make them the sole focus of prosecution strategy.

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

Performance Statistics

48.5%
Allow Rate
-13.5% vs TC avg
43
Total Applications
+13.4%
Interview Lift
1035
Avg Prosecution Days
Based on 33 resolved cases, 2023–2026

Rejection Statute Breakdown

4.1%
§101 Eligibility
26.2%
§102 Novelty
45.1%
§103 Obviousness
16.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19014620 RIC FOR SELECTING CELL TO PERFORM COMP FUNCTION AND METHOD OF OPERATING THE SAME Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
18619411 COMMUNICATION APPARATUS, NETWORK NODE AND METHOD Non-Final OA TOYOTA JIDOSHA KABUSHIKI KAISHA
18794122 RESOURCE SERVER AND SERVICE PROVIDING SYSTEM Non-Final OA Fujitsu Limited
17582696 WIRELESS NETWORK SELECTION IN INTERNATIONAL AREAS Final Rejection QUALCOMM Incorporated
18694786 COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD Final Rejection NTT DOCOMO, INC.
19037582 COMMUNICATION CONTROL METHOD Non-Final OA KYOCERA Corporation

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Frequently Asked Questions

What is examiner Chieh M Fan's allowance rate?

48.5% of resolved applications examined by Chieh M Fan were allowed (33 resolved cases), compared with 70.5% across Art Unit 2611 over the last five years.

Does an interview help with examiner Chieh M Fan?

This examiner's interview lift is +13.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Chieh M Fan take to allow a patent?

Applications allowed by Chieh M Fan took 1,035 days on average from filing to allowance.

Which art unit does examiner Chieh M Fan work in?

Chieh M Fan examines applications in Art Unit 2611 in Tech Center 2600 (Communications).

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