Prosecution Insights
Last updated: October 26, 2026

Kathleen Sonnett Holwerda, USPTO Patent Examiner

Listed by the USPTO as HOLWERDA, KATHLEEN SONNETT

Tech Center 4100 • Art Units: 3731 3771 4100

This examiner grants 69% of resolved cases

Analysis

HOLWERDA, KATHLEEN SONNETT is assigned to Tech Center 4100 and Art Unit 3731. The record covers 974 resolved cases, with a 68.8% allowance rate and a median of 1365 days to allowance. The 17.6% interview lift indicates a higher allowance outcome for cases involving interviews in this dataset.

The listed companies are Boston Scientific Corporation, Medtronic Inc., and Microvention Inc. The listed firms are SEAGER, TUFTE & WICKHEM, LLP, Foley & Lardner LLP, and PROCOPIO, CORY, HARGREAVES & SAVITCH LLP -. The statistics support planning for a prosecution process that may require multiple substantive interactions. An interview can be evaluated as part of that process, with preparation directed to concrete claim issues and a clear written follow-up.

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

Performance Statistics

68.8%
Allow Rate
+8.8% vs TC avg
1,031
Total Applications
+17.6%
Interview Lift
1365
Avg Prosecution Days
Based on 974 resolved cases, 2023–2026

Rejection Statute Breakdown

0.6%
§101 Eligibility
21.8%
§102 Novelty
46.4%
§103 Obviousness
23.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19195670 VASO-OCCLUSIVE DEVICES FOR OCCLUDING BLOOD VESSELS AND METHODS FOR MAKING AND USING SAME Non-Final OA STRYKER EUROPEAN OPERATIONS LIMITED
19227894 CONTROL MECHANISM FOR END EFFECTORS AND METHOD OF USE Non-Final OA Boston Scientific Scimed, Inc.
18975257 ENDOVASCULAR DEVICES AND METHODS FOR EXPLOITING INTRAMURAL SPACE Final Rejection BOSTON SCIENTIFIC SCIMED, INC.
18213223 Thrombectomy Apparatuses Final Rejection Boston Scientific Scimed, Inc.
18107182 METHODS OF TREATING VASCULAR LESIONS Final Rejection BOSTON SCIENTIFIC SCIMED, INC.
17705985 CUTTING DEVICES FOR SUTURING TOOLS AND RELATED SYSTEMS AND METHODS Non-Final OA INTUITIVE SURGICAL OPERATIONS, INC.
18931414 SURGICAL INSTRUMENT WITH MULTI-FUNCTION BUTTON Non-Final OA Cilag GmbH International
18339584 CATHETER ASSEMBLY AND USE METHOD Non-Final OA Terumo Kabushiki Kaisha
18763211 ULTRASOUND TRANSDUCER AND ARRAY FOR INTRAVASCULAR THROMBOLYSIS Final Rejection THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
19266599 SYSTEMS FOR PLACING A COAPTING MEMBER BETWEEN VALVULAR LEAFLETS Non-Final OA EDWARDS LIFESCIENCES CORPORATION
18855942 BENDABLE OPTICAL TROCAR ASSEMBLY Final Rejection MEDTRONIC, INC.
18497510 LOW PROFILE EMBOLIC PROTECTION DEVICE AND SYSTEM Non-Final OA Medtronic, Inc.
19321778 Integrated Tourniquet Garment Device Non-Final OA Individual inventor

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Kathleen Sonnett Holwerda's allowance rate?

68.8% of resolved applications examined by Kathleen Sonnett Holwerda were allowed (974 resolved cases), compared with 63.1% across Art Unit 3731 over the last five years.

Does an interview help with examiner Kathleen Sonnett Holwerda?

This examiner's interview lift is +17.6 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Kathleen Sonnett Holwerda take to allow a patent?

Applications allowed by Kathleen Sonnett Holwerda took 1,365 days on average from filing to allowance.

Which art unit does examiner Kathleen Sonnett Holwerda work in?

Kathleen Sonnett Holwerda examines applications in Art Unit 3731 in Tech Center 4100.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month