Prosecution Insights
Last updated: October 27, 2026

Burton S Mullins, USPTO Patent Examiner

Listed by the USPTO as MULLINS, BURTON S

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

This examiner grants 69% of resolved cases

Analysis

MULLINS, BURTON S examines cases in Technology Center 4100 and Art Unit 1721. The profile records 1335 resolved cases, an allowance rate of 68.9%, and a median time to allowance of 1013 days. Interview lift is 1.4%. The extensive docket provides a strong basis for historical review, while the interview figure shows little measured change in allowance outcomes associated with interviews.

The listed companies are Bayerische Motoren Werke Aktiengesellschaft, Robert Bosch GmbH, and MILWAUKEE ELECTRIC TOOL Corporation. The principal firms are CROWELL & MORING LLP, CAESAR RIVISE, PC, and Conley Rose, P.C. Practitioners may place greater emphasis on clear initial claim drafting and focused written responses, using interviews for defined issues rather than as a general allowance tactic. The median timing should also inform portfolio scheduling and continuation decisions.

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

Performance Statistics

68.9%
Allow Rate
+8.9% vs TC avg
1,381
Total Applications
+1.4%
Interview Lift
1013
Avg Prosecution Days
Based on 1335 resolved cases, 2023–2026

Rejection Statute Breakdown

1.6%
§101 Eligibility
20.5%
§102 Novelty
45.0%
§103 Obviousness
31.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19029192 BRUSHLESS DC MOTOR POWER TOOL WITH COMBINED PCB DESIGN Non-Final OA MILWAUKEE ELECTRIC TOOL CORPORATION
18352774 Machine Tool Apparatus, Machine Tool, and Method of Operating a Machine Tool Final Rejection Robert Bosch GmbH
18718234 ELECTRIC MOTOR WITH A MOTOR TERMINAL BOX Final Rejection ABB Schweiz AG
19027826 Motor for Oil Anti-Leakage, Powertrain, and Electric Vehicle Non-Final OA Huawei Digital Power Technologies Co., Ltd.
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
19099665 WINDING, WINDING ASSEMBLY, AND COMPONENT FOR AN ELECTRIC MACHINE Non-Final OA ZF FRIEDRICHSHAFEN AG
18377170 STATOR COOLING Non-Final OA Cummins Inc.
18873447 Rotating Electrical Machine Non-Final OA Hitachi, Ltd.
18271022 WHEEL MOTOR STRUCTURE Final Rejection HL MANDO CORPORATION
19025999 ELECTRIC ASSEMBLY AND VEHICLE HAVING SAME Non-Final OA BYD COMPANY LIMITED
18771955 STATOR ARRANGEMENT FOR A RADIAL FLUX MOTOR Non-Final OA BorgWarner Inc.
18525690 SERIES MULTI-COIL CLAMSHELL DESIGN FOR ACTUATORS Non-Final OA Aeva, Inc.

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Frequently Asked Questions

What is examiner Burton S Mullins's allowance rate?

68.9% of resolved applications examined by Burton S Mullins were allowed (1,335 resolved cases), compared with 40.6% across Art Unit 1721 over the last five years.

Does an interview help with examiner Burton S Mullins?

This examiner's interview lift is +1.4 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Burton S Mullins take to allow a patent?

Applications allowed by Burton S Mullins took 1,013 days on average from filing to allowance.

Which art unit does examiner Burton S Mullins work in?

Burton S Mullins examines applications in Art Unit 1721 in Tech Center 4100.

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