Prosecution Insights
Last updated: October 26, 2026

Son T Nguyen, USPTO Patent Examiner

Listed by the USPTO as NGUYEN, SON T

Tech Center 3600 • Art Units: 3643

This examiner grants 29% of resolved cases

Analysis

NGUYEN, SON T is a USPTO patent examiner in tech center 3600 and art unit 3643. The profile records 1174 resolved cases and a 28.9% allowance rate. Median time to allowance is 1238 days. Interview lift is 16.3%, below the allowance rate. The large resolved-case record supports close review of examiner-specific practice, while the allowance figure indicates that claim strategy may require sustained attention.

The listed companies are Midrib Farms Holding LLC, Myland Company Inc., and Toni Quint. The leading firms are Bass Patent Law, LLC, AMSTER, ROTHSTEIN & EBENSTEIN LLP, and DUANE MORRIS LLP - NY. The 1238-day median supports early planning for extended prosecution and careful management of amendment options.

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

Performance Statistics

28.9%
Allow Rate
-23.1% vs TC avg
1,227
Total Applications
+16.3%
Interview Lift
1238
Avg Prosecution Days
Based on 1174 resolved cases, 2023–2026

Rejection Statute Breakdown

0.7%
§101 Eligibility
19.2%
§102 Novelty
50.0%
§103 Obviousness
27.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19559035 METHOD OF ATTACHING A HOOF PROTECTOR TO A HOOF OF AN EQUINE ANIMAL Non-Final OA Toni Quint
19515534 SYSTEM FOR FEEDING ANIMALS, FEED CARRIAGE, AND USE OF SUCH A SYSTEM Non-Final OA LELY PATENT N.V.
19494192 MODULAR SADDLE TREE AND CANTLE Non-Final OA Ergon Equine Ltd.
19487443 COMMUNITY ADJUSTMENT MECHANISM FOR DROP FEEDERS Non-Final OA THE GSI GROUP, LLC
19380648 LANDSCAPE EDGING SYSTEM Non-Final OA Avon Plastics, Inc.
19126010 SUIT FOR PET Non-Final OA Individual inventor

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Frequently Asked Questions

What is examiner Son T Nguyen's allowance rate?

28.9% of resolved applications examined by Son T Nguyen were allowed (1,174 resolved cases), compared with 30.1% across Art Unit 3643 over the last five years.

Does an interview help with examiner Son T Nguyen?

This examiner's interview lift is +16.3 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Son T Nguyen take to allow a patent?

Applications allowed by Son T Nguyen took 1,238 days on average from filing to allowance.

Which art unit does examiner Son T Nguyen work in?

Son T Nguyen examines applications in Art Unit 3643 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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