Prosecution Insights
Last updated: October 02, 2026

Examiner: MULLINS, BURTON S

Tech Center 4100 • Art Units: 1721 2832 2834 3618 4100

This examiner grants 69% of resolved cases

Analysis

Examiner Burton S Mullins has resolved 1332 cases in Art Unit 1721. Within Tech Center 4100, the data shows an allowance rate of 68.8 percent for these 1332 cases. This 68.8 percent rate provides a baseline for practitioners to understand the outcomes of applications processed by this examiner.

The median days to allowance is 1013. This 1013 day figure represents the median duration for applications that reach a grant. Practitioners should use this 1013 day metric to set expectations for the timeline of prosecution in Art Unit 1721.

The interview lift is 1.5 percent, which indicates the measured increase in the probability of allowance when an interview is conducted relative to the 68.8 percent base rate. This 1.5 percent lift suggests that interviews have a measured impact on the likelihood of a grant for the 1332 resolved cases. The 1.5 percent lift is a factor to consider when determining whether to engage in direct communication in Tech Center 4100.

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
1,367
Total Applications
+1.5%
Interview Lift
1013
Avg Prosecution Days
Based on 1332 resolved cases, 2023–2026

Rejection Statute Breakdown

1.6%
§101 Eligibility
20.4%
§102 Novelty
45.1%
§103 Obviousness
31.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18931333 MOTOR Non-Final OA TOYOTA JIDOSHA KABUSHIKI KAISHA
18718234 ELECTRIC MOTOR WITH A MOTOR TERMINAL BOX Final Rejection ABB Schweiz AG
18352774 Machine Tool Apparatus, Machine Tool, and Method of Operating a Machine Tool Final Rejection Robert Bosch GmbH
18702125 METHOD AND DEVICE FOR COMPACTING COIL WINDINGS OF SEGMENTED STATORS Non-Final OA Schaeffler Technologies AG & Co. KG
18880343 End-Face Stator Lamination for a Stator Body of a Stator of an Electric Machine Non-Final OA BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT
18826340 Rotor for an Axial Flux Machine Having Axial Binding Arrangement Non-Final OA Bayerische Motoren Werke Aktiengesellschaft
18377170 STATOR COOLING Non-Final OA Cummins Inc.
18873447 Rotating Electrical Machine Non-Final OA Hitachi, Ltd.
18929990 ROTOR WITH SELF-SECURING END PLATE Non-Final OA FORD GLOBAL TECHNOLOGIES, LLC
18745073 Grounding Brush Assembly Non-Final OA AKTIEBOLAGET SKF
19025999 ELECTRIC ASSEMBLY AND VEHICLE HAVING SAME Non-Final OA BYD COMPANY LIMITED
18545421 AUDIO ENHANCEMENTS IN MOTOR-DRIVEN DEVICES Non-Final OA GoPro, Inc.
18894264 MOTOR CONTROLLER FOR A TOOL Non-Final OA Snap-on Incorporated
18525690 SERIES MULTI-COIL CLAMSHELL DESIGN FOR ACTUATORS Non-Final OA Aeva, Inc.

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