Prosecution Insights
Last updated: October 27, 2026

Zachary L Kuhfuss, USPTO Patent Examiner

Listed by the USPTO as KUHFUSS, ZACHARY L

Tech Center 3600 • Art Units: 3615 3617 3652

This examiner grants 78% of resolved cases

Analysis

KUHFUSS, ZACHARY L is assigned to tech center 3600 and art unit 3615. The record shows 1097 resolved cases and an allowance rate of 77.9%. Interview lift is 18.2%, indicating that interviews can support prosecution while remaining one part of the overall approach. The median time to allowance is 986 days, which supports structured planning for responses and continuation activity.

The listed companies are BNSF Railway Company, Vlr Technologies Limited, and Wabtec Corporation. The leading firms are K&L Gates LLP - Wabtec, STOUT, UXA & BUYAN, LLP, and AMSTER, ROTHSTEIN & EBENSTEIN LLP. Counsel may use interviews to clarify disputed limitations and then preserve the resulting analysis in a focused written response.

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

Performance Statistics

77.9%
Allow Rate
+25.9% vs TC avg
1,127
Total Applications
+18.2%
Interview Lift
986
Avg Prosecution Days
Based on 1097 resolved cases, 2023–2026

Rejection Statute Breakdown

0.9%
§101 Eligibility
25.4%
§102 Novelty
50.5%
§103 Obviousness
15.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18439971 RAILROAD MANAGEMENT SYSTEM, TRACK SENSING DEVICE, TRACK SENSING METHOD, CONTROL CIRCUIT, AND STORAGE MEDIUM Non-Final OA Mitsubishi Electric Corporation
18524569 CONDUCTING RAIL RETENTION SYSTEM Final Rejection Caterpillar Inc.
18722022 CARRIAGE BODY FOR A PASSENGER TRANSPORT VEHICLE Final Rejection Siemens Mobility GmbH
18658760 SYSTEMS AND METHODS FOR MONITORING AND VALIDATING STATUS OF SWITCH DEVICES Non-Final OA BNSF Railway Company
18658386 SYSTEMS OF METHODS FOR MANAGING OPERATIONS OF A CLASSIFICATION YARD Non-Final OA BNSF Railway Company
18622288 TRAIN POSITIONING METHOD AND POSITIONING SYSTEM Non-Final OA BYD COMPANY LIMITED
18662870 SYSTEM FOR A BRIDGE PLATE ASSEMBLY Final Rejection Transportation IP Holdings, LLC

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Frequently Asked Questions

What is examiner Zachary L Kuhfuss's allowance rate?

77.9% of resolved applications examined by Zachary L Kuhfuss were allowed (1,097 resolved cases), compared with 79.2% across Art Unit 3615 over the last five years.

Does an interview help with examiner Zachary L Kuhfuss?

This examiner's interview lift is +18.2 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Zachary L Kuhfuss take to allow a patent?

Applications allowed by Zachary L Kuhfuss took 986 days on average from filing to allowance.

Which art unit does examiner Zachary L Kuhfuss work in?

Zachary L Kuhfuss examines applications in Art Unit 3615 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

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