Prosecution Insights
Last updated: October 26, 2026

Charles Nana Appiah, USPTO Patent Examiner

Listed by the USPTO as APPIAH, CHARLES NANA

Tech Center 4100 • Art Units: 2617 2641 2642 4100

This examiner grants 47% of resolved cases

Analysis

APPIAH, CHARLES NANA is a USPTO patent examiner in tech center 4100 and art unit 2617. The profile covers 60 resolved cases, with an allowance rate of 46.7% and a median of 1186 days to allowance. Interview lift is 15.5%, indicating a positive association between interviews and allowance outcomes in the recorded cases.

The leading companies are Qualcomm Incorporated, Huawei Technologies Co., Ltd., and The Toronto-dominion Bank. The leading firms are THE WEBB LAW FIRM, P.C., Weaver Austin Villeneuve & Sampson LLP - QUAL, and Hitaffer, PLLC. The 60-case record makes the measures directional. The allowance rate supports careful claim and evidence development, while the positive interview lift supports targeted examiner engagement. The 1186-day median underscores the need for deliberate timing.

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

Performance Statistics

46.7%
Allow Rate
-13.3% vs TC avg
95
Total Applications
+15.5%
Interview Lift
1186
Avg Prosecution Days
Based on 60 resolved cases, 2023–2026

Rejection Statute Breakdown

2.4%
§101 Eligibility
24.7%
§102 Novelty
59.0%
§103 Obviousness
10.8%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18584220 LOCATION DETERMINING METHOD AND APPARATUS Non-Final OA HUAWEI TECHNOLOGIES CO., LTD.
18862171 HANDLING PRIVILEGES WHILE CHANGING GEOGRAPHICAL REGIONS Non-Final OA QUALCOMM Incorporated
18312455 SYSTEMS AND METHODS FOR PROVISION OF NETWORK COVERAGE INFORMATION TO WIRELESS DEVICES AND ENTITIES Non-Final OA QUALCOMM Incorporated
17798457 TERMINAL AND CAPABILITY INFORMATION TRANSMISSION METHOD Non-Final OA NTT DOCOMO, INC.
17942345 Transmission or Reception Configuration Method and Electronic Device Non-Final OA VIVO MOBILE COMMUNICATION CO.,LTD.
18584406 SYSTEM AND METHODS FOR PAIRING AND CONFIGURING NETWORK DEVICES Non-Final OA Qorvo US, Inc.

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Frequently Asked Questions

What is examiner Charles Nana Appiah's allowance rate?

46.7% of resolved applications examined by Charles Nana Appiah were allowed (60 resolved cases), compared with 66.3% across Art Unit 2617 over the last five years.

Does an interview help with examiner Charles Nana Appiah?

This examiner's interview lift is +15.5 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 Nana Appiah take to allow a patent?

Applications allowed by Charles Nana Appiah took 1,186 days on average from filing to allowance.

Which art unit does examiner Charles Nana Appiah work in?

Charles Nana Appiah examines applications in Art Unit 2617 in Tech Center 4100.

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