Prosecution Insights
Last updated: October 26, 2026

Colin W Stuart, USPTO Patent Examiner

Listed by the USPTO as STUART, COLIN W

Tech Center 3700 • Art Units: 3642 3771 3785 3791

This examiner grants 58% of resolved cases

Analysis

STUART, COLIN W works in tech center 3700 and art unit 3642. The profile covers 886 resolved cases, with an allowance rate of 57.9% and a median of 1354 days to allowance. The substantial record supports treating the allowance figure as a useful description of observed outcomes, while the median signals that prosecution often extends over a considerable period before allowance.

The interview lift is 54.8%, making interview strategy a prominent consideration for practitioners managing this docket. The listed companies are RESMED Pty Ltd., Therabody Inc., and Washington University. FOLEY & LARDNER LLP, Accelerate IP, and ARMSTRONG TEASDALE LLP (15060) are the listed firms, identifying counsel with recorded experience before the examiner.

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

Performance Statistics

57.9%
Allow Rate
-12.1% vs TC avg
921
Total Applications
+54.8%
Interview Lift
1354
Avg Prosecution Days
Based on 886 resolved cases, 2023–2026

Rejection Statute Breakdown

5.8%
§101 Eligibility
12.0%
§102 Novelty
37.4%
§103 Obviousness
34.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18260354 ADJUSTABLE SEAL FOR FLUID MANAGEMENT SYSTEM Non-Final OA Washington University
18428357 APPARATUS FOR SUPPLYING GAS, SUCH AS NO, TO A PATIENT, WITH COUNTING OF THE TOTAL ACTUAL TREATMENT TIME Non-Final OA INOSYSTEMS
18829787 NASAL CANNULA APPARATUS FOR OXYGEN DELIVERY AND RELATED METHODS Non-Final OA BRYAN MICHAEL LIN

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Frequently Asked Questions

What is examiner Colin W Stuart's allowance rate?

57.9% of resolved applications examined by Colin W Stuart were allowed (886 resolved cases), compared with 67.2% across Art Unit 3642 over the last five years.

Does an interview help with examiner Colin W Stuart?

This examiner's interview lift is +54.8 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Colin W Stuart take to allow a patent?

Applications allowed by Colin W Stuart took 1,354 days on average from filing to allowance.

Which art unit does examiner Colin W Stuart work in?

Colin W Stuart examines applications in Art Unit 3642 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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