Prosecution Insights
Last updated: October 26, 2026

Ann M Hu, USPTO Patent Examiner

Listed by the USPTO as HU, ANN M

Tech Center 3700 • Art Units: 3774 3783

This examiner grants 68% of resolved cases

Analysis

HU, ANN M is a USPTO patent examiner in tech center 3700 and art unit 3774. The record reports 959 resolved cases, an allowance rate of 67.8%, and a median of 1367 days to allowance. The interview lift is 21.5%, providing a meaningful engagement measure for practitioners assessing prosecution options.

The top companies are Edwards Lifesciences Corporation, In2Bones Usa LLC, and Stryker Corporation. The listed firms are RUTAN & TUCKER, LLP, SEAGER, TUFTE & WICKHEM, LLP, and Workman Nydegger. This substantial record can inform written response planning, interview preparation, and client discussions about timing.

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

Performance Statistics

67.8%
Allow Rate
-2.2% vs TC avg
1,023
Total Applications
+21.5%
Interview Lift
1367
Avg Prosecution Days
Based on 959 resolved cases, 2023–2026

Rejection Statute Breakdown

1.2%
§101 Eligibility
26.9%
§102 Novelty
48.0%
§103 Obviousness
17.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18675322 HUMERAL IMPLANT ANCHOR SYSTEM Non-Final OA HOWMEDICA OSTEONICS CORP.
18606432 DELIVERY SYSTEM COMMISSURAL ALIGNMENT MARKERS Non-Final OA BOSTON SCIENTIFIC SCIMED, INC.
18160004 CONTROLLED INGROWTH FEATURE FOR ANTIMIGRATION Non-Final OA BOSTON SCIENTIFIC SCIMED, INC.
19349704 EXPANDABLE SHEATH AND METHODS OF USING THE SAME Non-Final OA EDWARDS LIFESCIENCES CORPORATION
18649428 CATHETER BALLOON HAVING SEGMENTS OF VARYING COMPLIANCE Non-Final OA EDWARDS LIFESCIENCES CORPORATION
17909501 LEAFLET ATTACHMENT MECHANISM AND STRAIGHT ATTACHMENT STRUTS Final Rejection Edwards Lifesciences Corporation
17892654 HYBRID FRAME FOR PROSTHETIC HEART VALVE Final Rejection Edwards Lifesciences Corporation
18641827 ORTHOPAEDIC PROSTHESIS FOR AN INTERPHALANGEAL JOINT AND ASSOCIATED METHOD Non-Final OA DePuy Synthes Products, Inc.
17882700 STENT DELIVERY SYSTEM, ENDOSCOPE SYSTEM, AND STENT INDWELLING METHOD Final Rejection OLYMPUS CORPORATION
17729584 SURGERY DEVICE WITH PATIENT-SPECIFIC FIBULA MALLEOLUS CAP Final Rejection The University of Hong Kong

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Who Appears Before This Examiner

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Frequently Asked Questions

What is examiner Ann M Hu's allowance rate?

67.8% of resolved applications examined by Ann M Hu were allowed (959 resolved cases), compared with 61.7% across Art Unit 3774 over the last five years.

Does an interview help with examiner Ann M Hu?

This examiner's interview lift is +21.5 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Ann M Hu take to allow a patent?

Applications allowed by Ann M Hu took 1,367 days on average from filing to allowance.

Which art unit does examiner Ann M Hu work in?

Ann M Hu examines applications in Art Unit 3774 in Tech Center 3700 (Medical Devices & Mechanical Engineering).

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