USPTO Art Unit 2846 Prosecution Statistics

Art Unit Information

Art Unit: 2846
Group: 2840
Tech Center: 2800
Total Cases: 7,071
Last Active: October 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19363458PORTABLE FAN, DRIVE CIRCUIT, HANDHELD FAN, AND NECK FANOctober 2025February 2026Allow400YesNo
19289401Intelligent dual-mode electric floor brushAugust 2025January 2026Allow610NoNo
19267068Improvements to Switch Housing Remote ControlJuly 2025September 2025Allow200YesNo
19185276LINEAR BALL GUIDED VOICE COIL MOTOR FOR FOLDED OPTICApril 2025October 2025Allow510NoNo
19184395STEPLESS REGULATION FANApril 2025December 2025Allow810NoNo
19179874SYSTEMS AND METHODS FOR ELECTRIC DAMPING OF AIRCRAFT FLIGHT CONTROL SURFACES AND PROPELLERSApril 2025September 2025Allow510YesNo
19178723TRASH CAN ASSEMBLYApril 2025May 2025Allow100NoNo
19093363Comprehensive Control Method and System for Direct Current (DC) Power Grid of Pure Battery of ShipMarch 2025August 2025Allow510NoNo
19090954Online Fault Identification Method for Current Sensor, Diagnosis Apparatus, and Fault-tolerant Control SystemMarch 2025August 2025Allow410NoNo
19099703MODULAR BRAKING ADJUSTER WITH HYBRID DESIGNJanuary 2025June 2025Allow500NoNo
19034375VARIABLE POLE SYSTEM FOR ELECTRIC MOTORSJanuary 2025July 2025Allow510NoNo
19025203FAULT DETECTION RESPONSE IN A ROBOT ARMJanuary 2025March 2025Allow200NoNo
19013080FLEXIBLE SENSOR AND METHOD OF DETECTING BIAXIAL WRIST JOINT MOTION, AND ROBOTIC ARMJanuary 2025March 2025Allow200NoNo
18991860INTELLIGENT CONTROL SYSTEM FOR CIRCULAR HIGH-POWER VIBRATION MOTORDecember 2024February 2025Allow200NoNo
18964779ADAPTIVE SPEED CONTROL FOR LINE-FOLLOWING ROBOTS AND METHOD THEREOFDecember 2024March 2025Allow300NoNo
18863671CONVEYANCE SYSTEMNovember 2024April 2025Allow510YesNo
18937212OPTIMIZED REGENERATIVE BRAKING CONTROL OF ELECTRIC MOTORS USING LOOK-UP TABLESNovember 2024November 2025Allow1210NoNo
18927186PORTABLE FAN, DRIVE CIRCUIT, HANDHELD FAN, AND NECK FANOctober 2024September 2025Allow1011NoNo
18915421FLUX-WEAKENING CONTROL METHOD AND SYSTEM FOR SALIENT POLE OFFSET PERMANENT MAGNET SYNCHRONOUS MOTOROctober 2024November 2024Allow100NoNo
18916285VEHICLE AUXILIARY POWER SYSTEMOctober 2024January 2025Allow310NoNo
18888195LINEAR BALL GUIDED VOICE COIL MOTOR FOR FOLDED OPTICSeptember 2024January 2025Allow410NoNo
18844071ELECTRIC VALVE/DOOR, AND CONTROL APPARATUS AND METHOD THEREOFSeptember 2024February 2025Allow500NoNo
18819750METHOD FOR DESIGNING SPECIAL FUNCTION ROBOTSAugust 2024January 2025Allow510NoNo
18818066STEPLESS REGULATION FANAugust 2024March 2025Allow610NoNo
18842008METHOD FOR CONTROLLING AN INVERTER COMPRISING SELECTING A SAFETY MODEAugust 2024May 2025Allow910NoNo
18841908Method for Operating an Electric Drive System for a VehicleAugust 2024February 2025Allow500NoNo
18271239LOW-VIBRATION FAULT-TOLERANT CURRENT ALGORITHM FOR OPEN-PHASE FAULTS OF SIX-PHASE PERMANENT MAGNET MOTORSAugust 2024August 2025Allow2500NoNo
18730268MOTOR CONTROL USING PIECEWISE AFFINE MODELJuly 2024March 2025Allow700NoNo
18768201ROTARY PERMANENT MAGNET ELECTRODYNAMIC SUSPENSION DEVICE AND PERMANENT MAGNET ELECTRODYNAMIC SUSPENSION METHOD USING THE SAMEJuly 2024October 2024Allow400NoNo
18763438System And Method For Driving An Ultrasonic Handpiece With A Linear AmplifierJuly 2024April 2025Allow900NoNo
18760924REMOTE CONTROLLED POWER UNITJuly 2024August 2025Allow1420NoNo
18751697AUXILIARY ENERGY CIRCUIT FOR BATTERY-POWERED POWER TOOLJune 2024April 2025Allow900NoNo
18748934MOTOR CONTROL METHOD AND DEVICEJune 2024October 2024Allow410NoNo
18747942ELECTRIC TOOTHBRUSH, AND MOTOR CONTROL METHOD, DEVICE, SYSTEM, CONTROL BOARD, AND MEDIUM FOR THE SAMEJune 2024March 2025Allow910NoNo
18721458CURRENT DETECTION DEVICE, MOTOR CONTROL DEVICE, AND ELECTRIC POWER STEERING DEVICEJune 2024November 2024Allow400NoNo
18736693MOTOR-DRIVING APPARATUSJune 2024July 2025Allow1310NoNo
18716540MOTOR CONTROL DEVICE AND MOTOR CONTROL SYSTEMJune 2024November 2024Allow500NoNo
18733631POWER MODULE AND MOTOR DRIVE SYSTEM USING THE SAMEJune 2024April 2025Allow1010NoNo
18731781BATTERY-POWERED STAND-ALONE MOTOR UNITJune 2024December 2024Allow600YesNo
18679216ROBOTIC DEVICE AND METHODS FOR FABRICATION, USE AND CONTROL OF SAMEMay 2024May 2025Allow1200NoNo
18677110METHODS AND SYSTEM FOR POSITION STABILIZATIONMay 2024March 2025Allow1010NoNo
18712301CONTROL OF AN ELECTRIC MACHINE WITH TWO SEPARATE WINDING SYSTEMS, AND A CORRESPONDING CONTROL SYSTEM AND OPERATION OF AN ACTUATOR OF A STEER-BY-WIRE-SYSTEMMay 2024February 2026Allow2100NoNo
18671788VARIABLE POLE SYSTEM FOR ELECTRIC MOTORSMay 2024October 2024Allow510NoNo
18668353METHOD AND ARRANGEMENT FOR OPERATING PUMP SYSTEMMay 2024March 2026Allow2200NoNo
18710867ELECTRIC MOTOR CONTROL METHOD AND ELECTRIC MOTOR CONTROL DEVICEMay 2024July 2024Allow200NoNo
18663960INVERTER CIRCUITS AND ELECTRICAL PROPULSION SYSTEMS FOR EVTOL AIRCRAFTMay 2024July 2024Allow200NoNo
18664029INVERTER CIRCUITS AND ELECTRICAL PROPULSION SYSTEMS FOR EVTOL AIRCRAFTMay 2024March 2025Allow1000NoNo
18659674FAN SPEED ADJUSTMENT BASED ON DETECTION OF TYPE OF CONNECTED CABLEMay 2024March 2026Allow2200NoNo
18657533ENCODERLESS MOTOR WITH IMPROVED QUANTIZATION AND METHODS OF USE AND CALIBRATIONMay 2024February 2026Allow2100NoNo
18651830VIBRATION PRESENTING DEVICEMay 2024March 2025Allow1010NoNo
18705046POWER CONVERSION APPARATUS, MOTOR DRIVE APPARATUS, AND REFRIGERATION CYCLE APPLICATION DEVICEApril 2024February 2026Allow2200NoNo
18704987METHOD FOR AUTOMATICALLY SETTING AN ANGULAR POSITION SENSORApril 2024February 2026Allow2200NoNo
18644996PULSED ELECTRIC MACHINE CONTROLApril 2024January 2025Allow900NoNo
18703778PHASE ANGLE DETECTION SYSTEM, CONTROL DEVICE, AND PHASE ANGLE DETECTION METHODApril 2024February 2026Allow2100NoNo
18641630CONTROL SCHEME FOR FAULT TOLERANT CONVERTER TOPOLOGY BASED DUAL CHANNEL PERMANENT MAGNET MOTOR DRIVE SYSTEMApril 2024February 2026Allow2200NoNo
18639667Power supply circuit in an inverter for driving an electrical machine, method of operating the power supply circuit and safety control deviceApril 2024January 2026Allow2100NoNo
18637694GRINDER WITH LOSS OF CONTROL DETECTIONApril 2024January 2026Allow2100YesNo
18635827System and Method for Strain and Acceleration Based Analytics in an Independent Cart SystemApril 2024May 2025Allow1300NoNo
18636177SENSORLESS MOTOR CIRCUIT PROVIDING ACCURATE BACK ELECTROMOTIVE FORCE ZERO-CROSSING POINT DETECTION AND OPERATION METHOD THEREOFApril 2024February 2026Allow2200NoNo
18634575SYSTEM AND METHOD FOR MODIFIED ACTIVE ZERO SPACE VECTOR PULSE WIDTH MODULATIONApril 2024February 2026Allow2200NoNo
18634568SYSTEM AND METHOD FOR CONTROLLING A MULTI-PHASE POWER INVERTER OF AN ELECTRIC MACHINEApril 2024February 2026Allow2200NoNo
18632693ELECTRIC VEHICLE MOTOR ROTATIONAL SPEED VALUE GENERATING DEVICEApril 2024February 2026Allow2200NoNo
18699694POWER CONVERSION APPARATUS, MOTOR DRIVE UNIT, AND REFRIGERATION CYCLE APPLICATION APPARATUSApril 2024February 2026Allow2200NoNo
18698901CONTROL METHOD FOR SMART FURNITUREApril 2024February 2026Allow2200YesNo
18627059BATTERY TEMPERATURE BASED TOOL POWER REDUCTIONApril 2024February 2026Allow2310NoNo
18626499LINEAR BALL GUIDED VOICE COIL MOTOR FOR FOLDED OPTICApril 2024June 2024Allow300YesNo
18625554PARAMETER MONITORING AND CONTROL FOR AN ELECTRIC DRIVEN HYDRAULIC FRACKING SYSTEMApril 2024April 2025Allow1300NoNo
18625024MOTOR CONTROL DEVICEApril 2024February 2026Allow2200NoNo
18624043DIRECT LOCATING METHOD FOR CALCULATING POSITION OF PERMANENT MAGNET SYNCHRONOUS MOTORApril 2024December 2025Allow2100YesNo
18696598POWER CONVERTER, MOTOR DRIVE APPARATUS, AND REFRIGERATION CYCLE APPLIED APPARATUSMarch 2024February 2026Allow2300NoNo
18619887SYSTEMS FOR LOW INDUCTANCE FULL BRIDGE POWER MODULE FOR INVERTERMarch 2024February 2026Allow2300NoNo
18618441CONTROLLER CIRCUIT OF MOTOR AND CONTROL METHODMarch 2024March 2026Allow2410NoNo
18618016Bi-Stable, Sub-Commutated, Direct-Drive, Sinusoidal Motor Controller for Precision Position ControlMarch 2024February 2025Allow1110NoNo
18617170SYSTEM AND METHOD FOR SURFACE-MOUNTED PERMANENT MAGNET MOTOR CONTROL USING PEAK TORQUEMarch 2024February 2026Allow2200NoNo
18615089EASY HOLE START OPERATION FOR DRILLING POWER TOOLSMarch 2024March 2025Allow1210NoNo
18613672POWER CONVERTERMarch 2024February 2026Allow2200NoNo
18611745SINGLE LIVE WIRED SPEED CONTROL CIRCUIT OF CEILING FAN MOTORMarch 2024January 2026Allow2210NoNo
18611109ELECTRIC MOTOR CONTROLLERMarch 2024November 2025Allow2000NoNo
18606204ELECTRIC MOTOR DRIVING APPARATUS, CONTROL METHOD, VEHICLE, AND READABLE STORAGE MEDIUMMarch 2024September 2024Allow600YesNo
18606620POWER DISTRIBUTION WITHIN AN ELECTRIC MACHINEMarch 2024October 2024Allow700NoNo
18606555SERVO SYSTEMMarch 2024March 2026Allow2410NoNo
18603822MOTOR DRIVING REDUNDANCY DEVICE FOR ELECTRONIC PARKING BRAKEMarch 2024March 2026Allow2410NoNo
18604350TRACKING A POSITION OF A MOTORIZED WINDOW TREATMENTMarch 2024April 2025Allow1410YesNo
18603312DRIVING DEVICE AND CONTROL METHOD OF MOTORMarch 2024November 2025Allow2000NoNo
18602917TRASH CAN ASSEMBLYMarch 2024May 2024Allow300YesNo
18691122MOTOR BEARING WEAR STATE ESTIMATION DEVICE, BEARING WEAR STATE ESTIMATION METHOD, BEARING WEAR STATE ESTIMATION PROGRAM, AND CANNED MOTOR PUMPMarch 2024May 2024Allow200NoNo
18599483MOTOR DRIVER CIRCUIT, POSITIONING DEVICE USING IT, AND HARD DISK DEVICEMarch 2024October 2025Allow1900YesNo
18599769STEPPING MOTOR CONTROL DEVICE, MOVEMENT, WATCH, AND STEPPING MOTOR CONTROL METHODMarch 2024November 2025Allow2000NoNo
18600007CONTROL CIRCUIT FOR A DIRECT CURRENT MOTORMarch 2024February 2026Allow2410YesNo
18689867CONTROL DEVICEMarch 2024October 2025Allow1900NoNo
18598130MOTOR DRIVE DEVICEMarch 2024March 2026Allow2410NoNo
18689621MOTOR DRIVING DEVICE AND REFRIGERATION CYCLE-INCORPORATING DEVICEMarch 2024November 2025Allow2100NoNo
18689797EXCITATION WAVEFORM DETERMINATION DEVICE, MOTOR DRIVE DEVICE, EXCITATION WAVEFORM DETERMINATION METHOD, MOTOR DRIVE METHOD, AND PROGRAMMarch 2024December 2025Allow2200YesNo
18595450MOTOR SYSTEM OF ACCURATE BACK-ELECTROMOTIVE FORCE DETECTION AND OPERATION METHOD THEREOFMarch 2024October 2025Allow1900NoNo
18595545Multiple Output Power Supply for a Movable Barrier OperatorMarch 2024January 2025Allow1110NoNo
18596094SYSTEMS AND METHODS FOR ACTIVE DISCHARGE FOR INVERTER FOR ELECTRIC VEHICLEMarch 2024October 2025Allow2000NoNo
18595432METHOD FOR ENABLING PERMANENT MAGNET SYNCHRONOUS MOTOR TO START IN REVERSE DIRECTION AND ASSOCIATED MOTOR DEVICEMarch 2024November 2025Allow2000NoNo
18594430SYSTEM FOR MULTI-VARIABLE FLUX MEMORY MOTOR CONFIGURATIONMarch 2024February 2026Allow2410NoNo
18593396LINEAR GATE CURRENT BUFFER FOR PARALLEL POWER DEVICE DRIVING APPLICATIONSMarch 2024December 2025Allow2110YesNo
18593229ELECTRIC MOTORSMarch 2024February 2026Allow2410NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 2846.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
82
Examiner Affirmed
35
(42.7%)
Examiner Reversed
47
(57.3%)
Reversal Percentile
95.8%
Higher than average

What This Means

With a 57.3% reversal rate, the PTAB has reversed the examiner's rejections more often than affirming them. This reversal rate is in the top 25% across the USPTO, indicating that appeals are more successful here than in most other areas.

Strategic Value of Filing an Appeal

Total Appeal Filings
252
Allowed After Appeal Filing
94
(37.3%)
Not Allowed After Appeal Filing
158
(62.7%)
Filing Benefit Percentile
77.1%
Higher than average

Understanding Appeal Filing Strategy

Filing a Notice of Appeal can sometimes lead to allowance even before the appeal is fully briefed or decided by the PTAB. This occurs when the examiner or their supervisor reconsiders the rejection during the mandatory appeal conference (MPEP § 1207.01) after the appeal is filed.

In this dataset, 37.3% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is in the top 25% across the USPTO, indicating that filing appeals is particularly effective here. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Strategic Recommendations

✓ Appeals to PTAB show good success rates. If you have a strong case on the merits, consider fully prosecuting the appeal to a Board decision.

✓ Filing a Notice of Appeal is strategically valuable. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Art Unit 2846 - Prosecution Statistics Summary

Executive Summary

Art Unit 2846 is part of Group 2840 in Technology Center 2800. This art unit has examined 7,071 patent applications in our dataset, with an overall allowance rate of 90.1%. Applications typically reach final disposition in approximately 23 months.

Comparative Analysis

Art Unit 2846's allowance rate of 90.1% places it in the 90% percentile among all USPTO art units. This art unit has a significantly higher allowance rate than most art units at the USPTO.

Prosecution Patterns

Applications in Art Unit 2846 receive an average of 1.17 office actions before reaching final disposition (in the 7% percentile). The median prosecution time is 23 months (in the 89% percentile).

Strategic Considerations

When prosecuting applications in this art unit, consider the following:

  • The art unit's allowance rate suggests a more favorable examination environment compared to the USPTO average.
  • With fewer office actions than average, plan for relatively streamlined prosecution.
  • The median prosecution time is shorter than average and should be factored into your continuation and client communication strategies.
  • Review individual examiner statistics within this art unit to identify examiners with particularly favorable or challenging prosecution patterns.

Important Disclaimer

Not Legal Advice: The information provided in this report is for informational purposes only and does not constitute legal advice. You should consult with a qualified patent attorney or agent for advice specific to your situation.

No Guarantees: We do not provide any guarantees as to the accuracy, completeness, or timeliness of the statistics presented above. Patent prosecution statistics are derived from publicly available USPTO data and are subject to data quality limitations, processing errors, and changes in USPTO practices over time.

Limitation of Liability: Under no circumstances will IronCrow AI be liable for any outcome, decision, or action resulting from your reliance on the statistics, analysis, or recommendations presented in this report. Past prosecution patterns do not guarantee future results.

Use at Your Own Risk: While we strive to provide accurate and useful prosecution statistics, you should independently verify any information that is material to your prosecution strategy and use your professional judgment in all patent prosecution matters.