Prosecution Insights
Last updated: October 26, 2026

Tan Doan, USPTO Patent Examiner

Listed by the USPTO as DOAN, TAN

Tech Center 2400 • Art Units: 2442 2445 2455 2468

This examiner grants 73% of resolved cases

Analysis

DOAN, TAN works in tech center 2400 and art unit 2442. The profile covers 327 resolved cases, a 73.1% allowance rate, and a median of 1115 days to allowance. The 23.9% interview lift shows a meaningful relationship between interviews and improved allowance outcomes in the recorded cases.

The leading companies are Arrcus Inc., Huawei Technologies Co., Ltd., and Snap Inc. The leading firms are Stevens Law Group, HG Law LLP (Adeia), and Run8 Patent Group, LLC. Counsel can use these participants as practical indicators of recurring prosecution activity and consider interviews as part of a broader response strategy.

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

Performance Statistics

73.1%
Allow Rate
+15.1% vs TC avg
358
Total Applications
+23.9%
Interview Lift
1115
Avg Prosecution Days
Based on 327 resolved cases, 2023–2026

Rejection Statute Breakdown

11.3%
§101 Eligibility
15.5%
§102 Novelty
58.0%
§103 Obviousness
14.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18833123 TRANSMISSION OF DATA PACKET WITH DELAY INFORMATION TO AN INDUSTRIAL CONTROLLER Non-Final OA Telefonaktiebolaget LM Ericsson (publ)
18672225 INFORMATION PROCESSING SYSTEM, METHOD, AND DEVICE, AND STORAGE MEDIUM Non-Final OA HUAWEI TECHNOLOGIES CO., LTD.
18862609 SYSTEM AND METHOD FOR EXCHANGING PROCESS DATA RELATED TO INDUSTRIAL MANUFACTURING OR PROCESSING Final Rejection BASF SE

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Who Appears Before This Examiner

Top companies before this examiner

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Frequently Asked Questions

What is examiner Tan Doan's allowance rate?

73.1% of resolved applications examined by Tan Doan were allowed (327 resolved cases), compared with 66.2% across Art Unit 2442 over the last five years.

Does an interview help with examiner Tan Doan?

This examiner's interview lift is +23.9 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Tan Doan take to allow a patent?

Applications allowed by Tan Doan took 1,115 days on average from filing to allowance.

Which art unit does examiner Tan Doan work in?

Tan Doan examines applications in Art Unit 2442 in Tech Center 2400 (Networking & Security).

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