Prosecution Insights
Last updated: October 26, 2026

Stacy Brown Chen, USPTO Patent Examiner

Listed by the USPTO as CHEN, STACY BROWN

Tech Center 1600 • Art Units: 1648 1671 1672

This examiner grants 66% of resolved cases

Analysis

CHEN, STACY BROWN is a USPTO patent examiner in tech center 1600 and art unit 1648. The record contains 943 resolved cases, an allowance rate of 66.1%, and a median of 1136 days to allowance. The interview lift is 40.4%, indicating a substantial positive association between interviews and allowance outcomes in the available data.

The listed companies are ModernaTX Inc., The University of North Carolina at Chapel Hill, and Siemens Healthineers AG. The listed firms are Casimir Jones, S.C., FINNEGAN, HENDERSON, FARABOW, GARRETT & DUNNER, and Knobbe, Martens, Olson & Bear, LLP. Practitioners should account for interview strategy and the recorded prosecution duration when planning responses.

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

Performance Statistics

66.1%
Allow Rate
+6.1% vs TC avg
992
Total Applications
+40.4%
Interview Lift
1136
Avg Prosecution Days
Based on 943 resolved cases, 2023–2026

Rejection Statute Breakdown

5.8%
§101 Eligibility
14.4%
§102 Novelty
30.3%
§103 Obviousness
32.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18696032 METHODS AND COMPOSITIONS FOR RECOMBINANT DENGUE VIRUSES FOR VACCINE AND DIAGNOSTIC DEVELOPMENT Non-Final OA The University of North Carolina at Chapel Hill
18691351 COMPOSITIONS, KITS, AND METHODS FOR DUPLEX IMMUNOASSAY FOR ANTI-SARS-COV-2 ANTIBODIES Non-Final OA Siemens Healthcare Diagnostics Inc.
18549134 COMPOSITIONS, KITS, AND METHODS FOR VARIANT-RESISTANT DETECTION OF TARGET VIRAL SEQUENCES Non-Final OA LIFE TECHNOLOGIES CORPORATION

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Frequently Asked Questions

What is examiner Stacy Brown Chen's allowance rate?

66.1% of resolved applications examined by Stacy Brown Chen were allowed (943 resolved cases), compared with 49.6% across Art Unit 1648 over the last five years.

Does an interview help with examiner Stacy Brown Chen?

This examiner's interview lift is +40.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Stacy Brown Chen take to allow a patent?

Applications allowed by Stacy Brown Chen took 1,136 days on average from filing to allowance.

Which art unit does examiner Stacy Brown Chen work in?

Stacy Brown Chen examines applications in Art Unit 1648 in Tech Center 1600 (Biotechnology & Pharmaceuticals).

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