Prosecution Insights
Last updated: October 02, 2026

Examiner: COOK, BRIAN S

Tech Center 4100 • Art Units: 2123 2127 2146 2187 3648 4100

This examiner grants 62% of resolved cases

Analysis

Brian S. Cook has managed 502 resolved cases within Tech Center 4100. Working in Art Unit 2123, he maintains an allowance rate of 62.2 percent. This metric is essential for patent attorneys to gauge the likelihood of a favorable outcome and to tailor their prosecution approach accordingly.

The median days to allowance for this examiner is 1297. This duration provides a concrete expectation for the length of time an application might remain in the prosecution phase. A period of 1297 days is a significant factor in the strategic planning of a patent portfolio and the timing of potential patent rights.

Additionally, the data indicates an interview lift of 29.2 percent. This suggests that engaging in a direct dialogue with the examiner can notably improve the chances of allowance compared to the base rate of 62.2 percent. The 29.2 percent lift serves as a strong incentive for practitioners to utilize interviews as a tool to resolve outstanding issues and move the application toward a grant.

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

Performance Statistics

62.2%
Allow Rate
+2.2% vs TC avg
531
Total Applications
+29.2%
Interview Lift
1297
Avg Prosecution Days
Based on 502 resolved cases, 2023–2026

Rejection Statute Breakdown

22.8%
§101 Eligibility
2.9%
§102 Novelty
53.8%
§103 Obviousness
17.4%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18116224 In-Situ Mechanical Characterization Of Cement Sheath Exposed To Chemical Species Non-Final OA Halliburton Energy Services, Inc.
17979112 GENERATING DOWNHOLE FLUID COMPOSITIONS FOR WELLBORE OPERATIONS USING MACHINE LEARNING Final Rejection Halliburton Energy Services, Inc.
17804471 MULTI-AGENT SIMULATION SYSTEM AND METHOD Final Rejection TOYOTA JIDOSHA KABUSHIKI KAISHA
16514670 Detecting Fluid Types Using Petrophysical Inversion Final Rejection ExxonMobil Technology and Engineering Company
17501798 SYSTEM, METHOD AND APPARATUS OF ANALYTICAL CRITERIA FOR COMPOSITE STRUCTURE DURABILITY AND CERTIFICATION Non-Final OA The Boeing Company
17875879 System For The Simulation Of Electromagnetic Field Propagation Final Rejection THE REGENTS OF THE UNIVERSITY OF MICHIGAN
18127178 MANAGEMENT SYSTEM, MANAGEMENT METHOD, AND MANAGEMENT STORAGE MEDIUM Non-Final OA TOPCON CORPORATION
17647180 SOURCE OPERATOR RELATED TECHNIQUES FOR USE IN STREAMING ANALYTICS Final Rejection International Business Machines Corporation
17934821 DESIGN EXPLORER FOR COMPOSING PRODUCTS USING COMMON MODULAR SUBSYSTEMS AND COMPONENTS Non-Final OA Raytheon Company
17747017 METHOD AND SYSTEM FOR AUTOMATICALLY IDENTIFYING TUBE ELEMENTS Non-Final OA HCL Technologies Limited
18128560 METHOD OF DESIGNING AND MANUFACTURING MULTICHIP MODULE BASED ON ISOLATION SIMULATION Non-Final OA Skyworks Solutions, Inc.
18169972 DETERMINING LIKELIHOODS OF COMPUTER SYSTEM STATE TRANSITIONS BASED ON STATE TRANSITION HISTORIES Non-Final OA HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
18297506 SYSTEM AND METHOD FOR AUTOMATIC FLOORPLAN GENERATION Non-Final OA XEROX CORPORATION
18358830 MATERIAL SELECTION FOR DESIGNING A MANUFACTURING PRODUCT Non-Final OA DASSAULT SYSTEMES

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