Prosecution Insights
Last updated: October 26, 2026

Theodore N Yao, USPTO Patent Examiner

Listed by the USPTO as YAO, THEODORE N

Tech Center 3600 • Art Units: 3674 3676

This examiner grants 67% of resolved cases

Analysis

YAO, THEODORE N has 297 resolved cases, with an allowance rate of 66.7% and an interview lift of 39.0%. The median time to allowance is 1,059 days. The examiner works in tech center 3600 and art unit 3674. The resolved-case base provides useful historical context, while the timing figure supports planning for a prosecution process that may extend beyond the initial response.

Halliburton Energy Services Inc., Baker Hughes Holdings LLC, and Schlumberger Technology Corporation are the leading companies shown. Bracewell LLP, Brooks Kushman P.C., and COOK ALEX LTD are the leading firms. The interview figure supports making examiner engagement part of response planning, especially when counsel can use the meeting to clarify technical distinctions before refining the written record.

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

Performance Statistics

66.7%
Allow Rate
+14.7% vs TC avg
360
Total Applications
+39.0%
Interview Lift
1059
Avg Prosecution Days
Based on 297 resolved cases, 2023–2026

Rejection Statute Breakdown

1.0%
§101 Eligibility
21.3%
§102 Novelty
43.9%
§103 Obviousness
30.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19266305 PROBE AND METHOD FOR SAMPLING FLUIDS FROM A SUBTERRANEAN ENVIRONMENT Final Rejection Schlumberger Technology Corporation
19233124 HEATERS TO ACCELERATE SETTING OF EXPANDABLE METAL Final Rejection Halliburton Energy Services, Inc.
19232491 VOLTAGE TO ACCELERATE/DECELERATE EXPANDABLE METAL Final Rejection Halliburton Energy Services, Inc.
17118472 METHOD FOR HIGH-PRESSURE ACCESS THROUGH A MULTILATERAL JUNCTION Final Rejection Halliburton Energy Services, Inc.
18941143 CLEANING PRODUCT HAVING NONFIBROUS POLYMERIC ELEMENTS Non-Final OA The Procter & Gamble Company
18887629 Inhibiting Bridging In Annular Packs Within A Well Non-Final OA Chevron U.S.A. Inc.

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Frequently Asked Questions

What is examiner Theodore N Yao's allowance rate?

66.7% of resolved applications examined by Theodore N Yao were allowed (297 resolved cases), compared with 68.9% across Art Unit 3674 over the last five years.

Does an interview help with examiner Theodore N Yao?

This examiner's interview lift is +39.0 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Theodore N Yao take to allow a patent?

Applications allowed by Theodore N Yao took 1,059 days on average from filing to allowance.

Which art unit does examiner Theodore N Yao work in?

Theodore N Yao examines applications in Art Unit 3674 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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