Prosecution Insights
Last updated: October 26, 2026

Hai Vo, USPTO Patent Examiner

Listed by the USPTO as VO, HAI

Tech Center 3700 • Art Units: 1761 1781 1787 1788 1794 3723

This examiner grants 57% of resolved cases

Analysis

VO, HAI works in tech center 3700 and art unit 1761. The profile records 1232 resolved cases, an allowance rate of 57.1%, and a median of 1157 days to allowance. The interview lift is 72.5%, indicating a very strong positive association between interviews and allowance outcomes in this record.

The principal company clients are Zeon Corporation, Toray Industries Inc., and 3M Innovative Properties Company. The leading firms are KENJA IP LAW PC, WENDEROTH, LIND & PONACK, L.L.P., and Abel Schillinger, LLP. The substantial case record makes the interview measure particularly useful for planning, especially where counsel must address a relatively limited allowance result and extended prosecution timing.

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

Performance Statistics

57.1%
Allow Rate
-12.9% vs TC avg
1,302
Total Applications
+72.5%
Interview Lift
1157
Avg Prosecution Days
Based on 1232 resolved cases, 2023–2026

Rejection Statute Breakdown

0.3%
§101 Eligibility
21.0%
§102 Novelty
43.6%
§103 Obviousness
23.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18720307 ADHESIVE SYSTEM INCLUDING A TAPE WITH A FOAM SUPPORT LAYER Non-Final OA 3M INNOVATIVE PROPERTIES COMPANY
18699456 MULTILAYER PRESSURE-SENSITIVE ADHESIVE ASSEMBLY AND RELATED PROCESS Final Rejection 3M INNOVATIVE PROPERTIES COMPANY
18709938 POROUS BODY Final Rejection TORAY INDUSTRIES, INC.
18842192 CORE MATERIAL, SKIN-CORE STRUCTURAL BODY, AEROSPACE EQUIPMENT, FLYING OBJECT, AND METHOD FOR PRODUCING SKIN-CORE STRUCTURAL BODY Final Rejection TORAY INDUSTRIES, INC.
18194316 CROSSLINKED POLYETHYLENE FOAM Final Rejection Toray Plastics (America), Inc.
18918514 Functionalized Textile Compositions and Articles Non-Final OA Nelumbo Inc.
18509473 MULTILAYER COMPOSITE Non-Final OA SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION
18723064 FOAMED ASSEMBLY Final Rejection SABIC GLOBAL TECHNOLOGIES B.V.
18841881 REFRACTORY PRODUCT FOR USE IN CONTINUOUS CASTING, AND REFRACTORY PRODUCT MEMBER Non-Final OA KROSAKIHARIMA CORPORATION

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Frequently Asked Questions

What is examiner Hai Vo's allowance rate?

57.1% of resolved applications examined by Hai Vo were allowed (1,232 resolved cases), compared with 46.8% across Art Unit 1761 over the last five years.

Does an interview help with examiner Hai Vo?

This examiner's interview lift is +72.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Hai Vo take to allow a patent?

Applications allowed by Hai Vo took 1,157 days on average from filing to allowance.

Which art unit does examiner Hai Vo work in?

Hai Vo examines applications in Art Unit 1761 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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