Prosecution Insights
Last updated: October 02, 2026

Examiner: KUHFUSS, ZACHARY L

Tech Center 3600 • Art Units: 3615 3617 3652

This examiner grants 78% of resolved cases

Analysis

Zachary L. Kuhfuss is a high-volume examiner in Tech Center 3600 and Art Unit 3615, with 1093 resolved cases. The allowance rate pct for this examiner is 78.0, indicating a generally favorable environment for patent applicants. This 78.0 allowance rate pct provides a stable metric for those evaluating their chances of success in Art Unit 3615.

The interview lift pct is 18.0, showing that direct engagement with the examiner provides a meaningful boost to the chances of allowance. This 18.0 lift suggests that interviews are a useful tool for resolving issues, even with a baseline allowance rate pct of 78.0. In Tech Center 3600, the 18.0 interview lift pct serves as a tactical option for practitioners to advance their cases.

The median days to allowance is 986, which is an efficient timeframe for the 1093 resolved cases processed. Practitioners can expect a 986 median days to allowance when planning their strategy. The large volume of cases ensures that these metrics are a stable representation of the examiner's work. The 986 median days to allowance offers a reliable benchmark for temporal planning.

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
1,112
Total Applications
+18.2%
Interview Lift
986
Avg Prosecution Days
Based on 1096 resolved cases, 2023–2026

Rejection Statute Breakdown

0.9%
§101 Eligibility
25.4%
§102 Novelty
50.7%
§103 Obviousness
15.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18722022 CARRIAGE BODY FOR A PASSENGER TRANSPORT VEHICLE Final Rejection Siemens Mobility GmbH
18524569 CONDUCTING RAIL RETENTION SYSTEM Final Rejection Caterpillar Inc.
18658386 SYSTEMS OF METHODS FOR MANAGING OPERATIONS OF A CLASSIFICATION YARD Non-Final OA BNSF Railway Company
18658760 SYSTEMS AND METHODS FOR MONITORING AND VALIDATING STATUS OF SWITCH DEVICES Non-Final OA BNSF Railway Company
18819801 DEVICE FOR MONITORING RAIL BOGIE AND ASSOCIATED RAIL BOGIE Non-Final OA Aktiebolaget SKF
18622288 TRAIN POSITIONING METHOD AND POSITIONING SYSTEM Non-Final OA BYD COMPANY LIMITED
18692661 A Grid Framework Structure Final Rejection OCADO INNOVATION LIMITED

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