Prosecution Insights
Last updated: October 27, 2026

Kenneth W Chang, USPTO Patent Examiner

Listed by the USPTO as CHANG, KENNETH W

Tech Center 2400 • Art Units: 2431 2438

This examiner grants 87% of resolved cases

Analysis

CHANG, KENNETH W works in tech center 2400 and art unit 2431. The profile contains 633 resolved cases, with an 86.6% allowance rate and a median of 888 days to allowance. The data reflects a high allowance outcome alongside a prosecution period that remains material for filing and portfolio planning.

The interview lift is 1.3%, so the recorded association between interviews and allowance is limited in this profile. The listed companies are State Farm Mutual Automobile Insurance, Capital One Services, and Mastercard International. The leading firms are HOLLAND & KNIGHT, Hovey Williams, and KDW Firm. Practitioners may therefore place greater emphasis on claim clarity and written responses than on relying on interviews as a primary driver of outcome.

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

Performance Statistics

86.6%
Allow Rate
+28.6% vs TC avg
649
Total Applications
+1.3%
Interview Lift
888
Avg Prosecution Days
Based on 633 resolved cases, 2023–2026

Rejection Statute Breakdown

16.1%
§101 Eligibility
15.1%
§102 Novelty
41.9%
§103 Obviousness
18.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18422420 TIME-BASED ONE-TIME PASSWORD ON AUTHENTICATION TOKEN Final Rejection Capital One Services, LLC
19059126 SYSTEMS AND METHODS FOR CONTROLLING DATA USAGE BY END USERS Non-Final OA State Farm Mutual Automobile Insurance Company
18817587 AUTOMATED SERVICE TICKET GENERATION Non-Final OA State Farm Mutual Automobile Insurance Company
19208251 METHODS AND SYSTEMS FOR SMART IDENTIFICATION AND STEP-UP AUTHENTICATION Non-Final OA Mastercard International Incorporated
18867950 COMMUNICATION NODE, DATA TRANSMISSION METHOD, AND STORAGE MEDIUM Final Rejection ZTE CORPORATION

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Frequently Asked Questions

What is examiner Kenneth W Chang's allowance rate?

86.6% of resolved applications examined by Kenneth W Chang were allowed (633 resolved cases), compared with 76.5% across Art Unit 2431 over the last five years.

Does an interview help with examiner Kenneth W Chang?

This examiner's interview lift is +1.3 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Kenneth W Chang take to allow a patent?

Applications allowed by Kenneth W Chang took 888 days on average from filing to allowance.

Which art unit does examiner Kenneth W Chang work in?

Kenneth W Chang examines applications in Art Unit 2431 in Tech Center 2400 (Networking & Security).

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