USPTO Art Unit 3747 Prosecution Statistics

Art Unit Information

Art Unit: 3747
Group: 3740
Tech Center: 3700
Total Cases: 40,539
Last Active: September 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19335710SYSTEMS AND METHODS FOR PHASE-SAFE AMMONIA VAPOR FUEL DELIVERY TO AN INTERNAL COMBUSTION ENGINESeptember 2025February 2026Allow500NoNo
19248571FUEL INJECTED INDEPENDENT ROTARY VALVE ENGINEJune 2025August 2025Allow210NoNo
19248574COMBUSTION INJECTION AND CONTROL METHOD FOR ROTARY VALVE ENGINEJune 2025August 2025Allow210NoNo
19222111SYSTEMS AND METHODS FOR SUPPLEMENTING RADIATOR COOLING WITH AN AMMONIA HEAT-EXCHANGE UNIT AND ADJUSTABLE AIR INTAKE LOUVERSMay 2025August 2025Allow200NoNo
19222161SYSTEMS AND METHODS FOR SUPPLEMENTING AN AMMONIA HEAT-EXCHANGE UNIT FOR ENGINE COOLING WITH A RADIATORMay 2025August 2025Allow200NoNo
19198369SUPPLEMENTAL FUEL CONTROL SYSTEMMay 2025July 2025Allow200NoNo
19183677INDEPENDENT ROTARY VALVE ENGINEApril 2025June 2025Allow200NoNo
19083239COAXIAL VALVE SYSTEMMarch 2025February 2026Abandon1110NoNo
19045614FUEL REFORMING SYSTEM FOR VEHICLE WITH ENGINE MOUNTED THEREONFebruary 2025February 2026Allow1300NoNo
19044126ENHANCEMENTS FOR CARBURETED AND RETROFIT ELECTRONIC FUEL INJECTION AIRCRAFT ENGINESFebruary 2025April 2025Allow200NoNo
19038990CYLINDER BLOCKJanuary 2025March 2026Allow1400YesNo
18998254PUMPJanuary 2025March 2026Allow1300NoNo
19034868MOBILE OBJECT CONTROL DEVICE AND MOBILE OBJECT CONTROL METHODJanuary 2025February 2026Allow1310NoNo
19023354FUEL PRESSURE CONTROLLER FOR INTERNAL COMBUSTION ENGINEJanuary 2025February 2026Allow1300NoNo
19018709DRAINAGE STRUCTURE FOR COOLING WATERJanuary 2025February 2026Allow1300NoNo
19014707PREDICTING VEHICLE TRAVEL RANGEJanuary 2025March 2026Allow1400NoNo
19006986System and Method of Immobilizing a Vehicle to Prevent Vehicle TheftDecember 2024April 2025Allow310NoNo
19007093GAS TURBINE ENGINEDecember 2024September 2025Allow800NoNo
19005191VEHICLE WITH ENGINEDecember 2024February 2026Allow1300NoNo
19001449CONTROL DEVICE FOR HYDROGEN ENGINEDecember 2024March 2026Allow1500NoNo
19001159TASK CONTEXT SWITCH FOR NEURAL PROCESSOR CIRCUITDecember 2024March 2026Allow1500NoNo
18999073EVAPORATIVE EMISSIONS LEAK CHECK MODULE WITH VOC MEASUREMENTDecember 2024February 2026Allow1300YesNo
19000670CONTROLLER FOR INTERNAL COMBUSTION ENGINEDecember 2024February 2026Allow1300NoNo
18989219WIRED BRAKING MODULE, WIRED BRAKING SYSTEM, AND CONTROL METHOD FOR THE SAMEDecember 2024March 2026Allow1400NoNo
18987256ENGINE COOLING DEVICEDecember 2024February 2026Allow1400NoNo
18876741AMMONIA ENGINE SYSTEMDecember 2024February 2026Allow1400NoNo
18983647RECIPROCATING INTERNAL COMBUSTION ENGINEDecember 2024February 2026Allow1400NoNo
18876022A RAILWAY COMMUNICATIONS SYSTEMDecember 2024March 2026Allow1500NoNo
18983902TRAVELING CONTROL DEVICE, TRAVELING CONTROL METHOD, AND NON-TRANSITORY RECORDING MEDIUMDecember 2024February 2026Allow1400NoNo
18982412TRANSMISSION DEVICE FOR DRIVING A FAN OF A COOLING CIRCUIT OF AN INTERNAL COMBUSTION ENGINE, ASSOCIATED COOLING CIRCUIT, AND VEHICLEDecember 2024February 2026Allow1400NoNo
18875395METHOD AND SYSTEM FOR CONTROLLING A HYBRID MOTOR VEHICLE DURING DECELERATIONSDecember 2024March 2026Allow1500NoNo
18976009ENGINE LUBRICANT OPTIMIZATION FOR ADVANCED SUSTAINABLE FUELSDecember 2024March 2026Allow1500YesNo
18973469DRIVE ASSIST DEVICEDecember 2024February 2026Allow1500NoNo
18972034METHOD AND DEVICE FOR AUTOMATICALLY CONTROLLING VEHICLE START-UPDecember 2024December 2025Allow1200YesNo
18971289VEHICLEDecember 2024January 2026Allow1410NoNo
18972251Rocker Arm for Brake with Integrated Hydraulic CapsuleDecember 2024February 2026Allow1400NoNo
18969817INTERNAL COMBUSTION ENGINEDecember 2024March 2026Allow1500YesNo
18969547FUEL INJECTOR ADAPTERDecember 2024October 2025Allow1100NoNo
18968596LANE DEPARTURE SUPPRESSION DEVICE AND LANE DEPARTURE SUPPRESSION METHODDecember 2024February 2026Allow1500NoNo
18968555Two Stroke Charge Piston EngineDecember 2024January 2025Allow200NoNo
18871633TORQUE ESTIMATION APPARATUS FOR INTERNAL COMBUSTION ENGINEDecember 2024November 2025Allow1100NoNo
18967692PORTABLE BACKUP STARTING DEVICE FOR VEHICLEDecember 2024June 2025Allow610NoNo
18966509INJECTOR CONTROLLERDecember 2024March 2026Allow1510NoNo
18966418METHOD FOR CONTROLLING AN ADJUSTABLE VIBRATION DAMPERDecember 2024February 2026Allow1500NoNo
18871017METHOD FOR GENERATING A TARGET VALUE, METHOD FOR CONTROLLING AN ACTUATOR, AND CONTROLLERDecember 2024February 2026Allow1500NoNo
18965680UNLEADED AVGAS COMPOSITIONDecember 2024March 2026Allow1500NoNo
18965253SYSTEM AND METHOD FOR RECOVERY OF REDUNDANT GASEOUS FUEL FROM A GASEOUS FUEL SUPPLY SYSTEMDecember 2024February 2026Allow1500NoNo
18965226GASEOUS FUEL SUPPLY SYSTEM TO A CLEAN COMBUSTION ENGINEDecember 2024October 2025Allow1000NoNo
18965298GASEOUS FUEL SUPPLY SYSTEM FOR A CLEAN COMBUSTION ENGINE OF A VEHICLEDecember 2024February 2026Allow1400NoNo
18965679AMMONIA-FUELED ENGINE BASED ON OXYGEN ENHANCEMENT AND AMMONIA-RICH COMBUSTION CONTROL METHOD THEREOFDecember 2024January 2026Allow1400NoNo
18871110METHOD FOR MANAGING A STALL PHASE OF AN INTERNAL COMBUSTION ENGINE ASSOCIATED WITH AN ELECTRIC MOTORDecember 2024February 2026Allow1510NoNo
18870349Method of Operating a Cooling System, Computer Program, Computer-Readable Medium, Control Arrangement, Cooling System, and VehicleNovember 2024November 2025Allow1100NoNo
18963339ENGINE BRAKING MODE SELECTION SYSTEMS AND METHODSNovember 2024February 2026Allow1510NoNo
18870182METHOD OF OPERATING AN INTERNAL COMBUSTION ENGINE AND CORRESPONDING ARRANGEMENTNovember 2024March 2026Allow1510NoNo
18960582Toroidal Vortex Induction DiffuserNovember 2024February 2025Allow310NoNo
18960494ROCKER ARM ASSEMBLYNovember 2024February 2026Allow1410NoNo
18960129KNOCKING CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND KNOCKING CONTROL DEVICENovember 2024March 2026Allow1610NoNo
18959120WATER MANAGEMENT SYSTEM FOR A HYDROGEN ENGINENovember 2024February 2026Allow1510NoNo
18958645METHOD OF AND SYSTEM FOR CONTROLLING MARINE PROPULSION DEVICENovember 2024February 2026Allow1410YesNo
18868697METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINENovember 2024January 2026Allow1400YesNo
18868288METHOD OF OPERATING A HYDROGEN INTERNAL COMBUSTION ENGINENovember 2024February 2026Allow1510NoNo
18698909CylinderNovember 2024January 2026Allow2110NoNo
18955194CONTROL DEVICE FOR ENGINENovember 2024October 2025Allow1100NoNo
18868150AUTOMATED DRIVING METHOD PERFORMED BY ARTICULATED VEHICLENovember 2024February 2026Allow1500NoNo
18951937INTERNAL COMBUSTION ENGINENovember 2024December 2025Allow1210NoNo
18952712METHOD FOR ASCERTAINING A CONTINUOUS BRAKING POWER, COMPUTER PROGRAM AND/OR COMPUTER-READABLE MEDIUM, CONTROLLER AND VEHICLE, IN PARTICULAR COMMERCIAL VEHICLENovember 2024February 2026Allow1500NoNo
18950861SYSTEMS AND METHODS FOR GENSET COOLANT CONTROLNovember 2024November 2025Allow1200NoNo
18866629SLIDING MEMBER AND INTERNAL COMBUSTION ENGINENovember 2024February 2026Allow1510NoNo
18947019CONTROL APPARATUS FOR ENGINENovember 2024February 2026Allow1500YesNo
18945485BRAKE APPARATUS AND METHOD OF CONTROLLING THE SAMENovember 2024March 2026Allow1600NoNo
18944863INTERNAL COMBUSTION ENGINENovember 2024July 2025Allow920YesNo
18944768STEERING ANGLE ESTIMATION DEVICE AND METHOD FOR ELECTRIC STEERING SYSTEMNovember 2024February 2026Allow1500NoNo
18864209CONTROL DEVICE FOR COMBINATION VEHICLE, CONTROL METHOD FOR COMBINATION VEHICLE, AND CONTROL PROGRAM FOR COMBINATION VEHICLENovember 2024February 2026Allow1500NoNo
18941487METHOD FOR THE LONGITUDINAL GUIDANCE OF A VEHICLE IN RELATION TO A LEADING VEHICLE DRIVING IN FRONT BY USING AN ELECTRONIC DISTANCE-KEEPING SYSTEM, AND DISTANCE-KEEPING SYSTEM FOR A VEHICLENovember 2024February 2026Allow1500NoNo
18864157DATA COMMUNICATION SYSTEM, COMPUTER-IMPLEMENTED METHOD FOR DATA COMMUNICATION IN A RAILWAY NETWORK, COMPUTER PROGRAM AND NON-VOLATILE DATA CARRIERNovember 2024February 2026Allow1600NoNo
18940598RESET VALVE FOR COMPRESSION RELEASE BRAKENovember 2024December 2025Allow1300YesNo
18939867Turbulence Inducer for Internal Combustion EnginesNovember 2024October 2025Allow1100YesNo
18939519CONTROLLER FOR INTERNAL COMBUSTION ENGINENovember 2024October 2025Allow1100NoNo
18863952OPPOSED-PISTON INTERNAL COMBUSTION ENGINENovember 2024October 2025Allow1100YesNo
18940487INTERNAL COMBUSTION ENGINENovember 2024May 2025Allow610NoNo
18863559RENEWABLE ENERGY UTILIZATION SYSTEM BASED ON NITROGEN-FREE COMBUSTION AND CARBON DIOXIDE RECYCLINGNovember 2024March 2026Abandon1610NoNo
18938659ADAPTIVE SPARK ENERGY CONTROLNovember 2024November 2025Allow1200NoNo
18863468CYLINDER HEAD STRUCTURENovember 2024January 2026Allow1410NoNo
18863097INTAKE MANIFOLD WITH INTEGRATED FUEL RETURN PASSAGENovember 2024October 2025Allow1100NoNo
18862626FRICTION TESTING SYSTEM, COMPUTER-IMPLEMENTED FRICTION-TESTING METHOD FOR A RAIL VEHICLE, COMPUTER PROGRAM AND NON-VOLATILE DATA CARRIERNovember 2024March 2026Allow1610NoNo
18935973AMMONIA-RICH COMBUSTION COUPLED DUAL-MODE PRECHAMBER AMMONIA-FUELED ENGINE CONTROL SYSTEMNovember 2024September 2025Allow1000NoNo
18936408MIDPOINT CORRECTION DEVICE, MIDPOINT CORRECTION METHOD, AND STORAGE MEDIUM FOR STEERING TORQUE SENSORNovember 2024March 2026Allow1600NoNo
18936707CAMLESS RECIPROCATING ENGINE CONTROL SYSTEMNovember 2024October 2025Allow1210YesNo
18934740SYSTEM AND METHOD OF CONTROLLING A VEHICLENovember 2024October 2025Allow1200YesNo
18933074OIL PAN WITH AIR RETURN PORTS FOR DIRECTING AIRFLOW IN INTERNAL COMBUSTION ENGINESOctober 2024December 2024Allow200YesNo
18931475SYSTEM AND METHOD TO PREVENT LATERAL CONTROL BY LIMITING TURNING BY A STEERING WHEELOctober 2024January 2026Allow1500NoNo
18932124ENGINE CONTROL SYSTEM AND METHODSOctober 2024March 2026Allow1610NoNo
18931773WATER JACKET SPACER STRUCTUREOctober 2024January 2026Allow1400NoNo
18712325WATER OUTLETOctober 2024December 2025Allow1910NoNo
18931898SYSTEM FOR CONTROLLING PRODUCTION OF OZONE FOR AN INTERNAL COMBUSTION ENGINEOctober 2024March 2026Allow1600NoNo
18861822CONTROL DEVICE OF VEHICLE STEERING SYSTEMOctober 2024February 2026Allow1600NoNo
18932200ENGINE REVERSE ROTATION AND CONTROLOctober 2024January 2026Allow1510YesNo
18861670Method of Starting a Compression Ignition EngineOctober 2024September 2025Allow1100NoNo
18929651CONTROLLER FOR INTERNAL COMBUSTION ENGINEOctober 2024March 2026Allow1610NoNo
18929987IDENTIFYING AND COUNTING COMMON RAIL FUEL SYSTEM PRESSURE RELIEF VALVE OPENING EVENTSOctober 2024August 2025Allow1000NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 3747.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
315
Examiner Affirmed
143
(45.4%)
Examiner Reversed
172
(54.6%)
Reversal Percentile
95.3%
Higher than average

What This Means

With a 54.6% 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
1220
Allowed After Appeal Filing
474
(38.9%)
Not Allowed After Appeal Filing
746
(61.1%)
Filing Benefit Percentile
83.6%
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, 38.9% 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 3747 - Prosecution Statistics Summary

Executive Summary

Art Unit 3747 is part of Group 3740 in Technology Center 3700. This art unit has examined 40,539 patent applications in our dataset, with an overall allowance rate of 85.3%. Applications typically reach final disposition in approximately 22 months.

Comparative Analysis

Art Unit 3747's allowance rate of 85.3% places it in the 80% 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 3747 receive an average of 1.24 office actions before reaching final disposition (in the 9% percentile). The median prosecution time is 22 months (in the 92% 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.