Prosecution Insights
Last updated: October 02, 2026

Examiner: GEISS, BRIAN BUTLER

Tech Center 2800 • Art Units: 2855 2857 2863

This examiner grants 70% of resolved cases

Analysis

Brian Butler Geiss, based in Tech Center 2800 and Art Unit 2855, has 69 resolved cases. The examiner has an allowance rate of 69.6 percent and a median days to allowance of 1160. This indicates a moderate level of difficulty and a timeline of over three years.

The interview lift for this examiner is 26.3 percent, which is a significant value. This suggests that interviews are a highly effective tool for resolving rejections and moving toward an allowance. When the 26.3 percent lift is applied, the probability of success increases substantially over the 69.6 percent baseline. The 69 resolved cases provide a sufficient sample to identify these trends.

Practitioners should factor the 1160-day median pendency into their overall prosecution strategy. Given the 26.3 percent interview lift, requesting an interview should be a standard part of the process. These data points provide a clear roadmap for navigating the examination process in Art Unit 2855.

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

Performance Statistics

69.6%
Allow Rate
+1.6% vs TC avg
91
Total Applications
+26.3%
Interview Lift
1160
Avg Prosecution Days
Based on 69 resolved cases, 2023–2026

Rejection Statute Breakdown

25.0%
§101 Eligibility
16.1%
§102 Novelty
48.3%
§103 Obviousness
9.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18207510 METHODS AND SYSTEMS OF DETECTING DEFECTS OF WAFER Non-Final OA SAMSUNG ELECTRONICS CO., LTD.
17968628 Fast Proxy Model For Well Casing Integrity Evaluation Final Rejection Halliburton Energy Services, Inc.
18401552 EXTERNAL ENVIRONMENT RECOGNITION APPARATUS Non-Final OA Honda Motor Co., Ltd.
18606997 METHOD AND SYSTEM FOR CALCULATING BATTERY STATE OF CHARGE Non-Final OA SAMSUNG SDI CO., LTD.
18481366 ELECTRICAL GRID ORIGINATION DETERMINATION BY POWER LINE DISTURBANCE CHARACTERISTICS Final Rejection INTERNATIONAL BUSINESS MACHINES CORPORATION
17781508 Method and Apparatus for Sensor Measurements Processing Non-Final OA Siemens Aktiengesellschaft
18696081 METHOD AND DEVICE FOR DETECTING A DEFECT USING ULTRASOUND Non-Final OA SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN
18104183 METHODS AND DEVICES FOR TESTING A DEVICE UNDER TEST USING MULTIPLE SIGNALS TRANSMITTED VIA A BIDIRECTIONAL REAL-TIME INTERFACE Non-Final OA Advantest Corporation
18586392 SEPARATED MULTI-CORE TRANSMITTING DEVICES BASED ON GROUND TRANSIENT ELECTROMAGNETIC METHODS Non-Final OA CHINA UNIVERSITY OF MINING AND TECHNOLOGY

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