USPTO Art Unit 3741 Prosecution Statistics

Art Unit Information

Art Unit: 3741
Group: 3740
Tech Center: 3700
Total Cases: 16,273
Last Active: March 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19083171GAS TURBINE ENGINEMarch 2025April 2025Allow100NoNo
19066792Orbital Maneuver ApparatusFebruary 2025June 2025Allow310NoNo
19032996GAS TURBINE ENGINEJanuary 2025May 2025Allow310NoNo
19005225COMBINED CYCLE POWER GENERATION FACILITYDecember 2024June 2025Allow600NoNo
18990685GEARBOX ASSEMBLY WITH LUBRICANT EXTRACTION VOLUME RATIODecember 2024June 2025Allow510YesNo
18990706GEARBOX ASSEMBLY WITH LUBRICANT EXTRACTION VOLUME RATIODecember 2024February 2025Allow200NoNo
18975350GAS TURBINE ENGINE WITH THIRD STREAMDecember 2024June 2025Allow600NoNo
18971137JET ENGINEDecember 2024March 2025Allow300YesNo
18960264CONDENSER FOR HYDROGEN STEAM INJECTED TURBINE ENGINENovember 2024June 2025Allow710NoNo
18949069NUCLEAR THERMAL PROPULSION SYSTEM WITH REACTOR DIRECT DRIVE OF CRYOCOOLER TURBINENovember 2024March 2025Allow400NoNo
18947604COMBUSTOR NOZZLE, COMBUSTOR, AND GAS TURBINE INCLUDING SAMENovember 2024April 2025Allow500NoNo
18937193ENGINE MOUNT SYSTEM FOR A GAS TURBINE ENGINENovember 2024June 2025Allow710NoNo
18929956GAS TURBINE ENGINE WITH FRONT SUPPORT ARRANGEMENTOctober 2024April 2025Allow610NoNo
18927765Orbital Maneuver Apparatus for Sea Vehicle and Air VehicleOctober 2024January 2025Allow300YesNo
18911758Mobile Electric Power Generation for Hydraulic Fracturing of Subsurface Geological FormationsOctober 2024June 2025Allow801YesNo
18909133GUIDE VANE ASSEMBLYOctober 2024May 2025Allow700YesNo
18852382SUSPENSION OF A TRIPLE-FLOW AIRCRAFT TURBINE ENGINESeptember 2024June 2025Allow800NoNo
18850333COMBUSTOR AND GAS TURBINESeptember 2024May 2025Allow800NoNo
18894458MULTI-STAGE MICRO-DECOMPOSITION SWIRL BURNER WITH AN AMMONIA-DOPED FUEL AND LOW NOX CONTROL METHODSeptember 2024November 2024Allow200NoNo
18888873GAS TURBINE ENGINE WITH THIRD STREAMSeptember 2024May 2025Allow810NoNo
18885392LOW-FREQUENCY ACOUSTIC CENTER BODYSeptember 2024June 2025Allow910NoNo
18846327LUBRICATION AND COOLING OF EQUIPMENT OF AN AIRCRAFT TURBOMACHINESeptember 2024May 2025Allow800YesNo
18839141TURBINE ENGINE FOR AN AIRCRAFTAugust 2024April 2025Allow700NoNo
18805867AIR RECUPERATED ENGINE WITH AIR REINJECTIONAugust 2024April 2025Allow810YesNo
18804670TILE FOR A GAS TURBINE ENGINE COMBUSTORAugust 2024May 2025Allow911YesNo
18802196GAS TURBINE CONTROL DEVICE AND GAS TURBINE CONTROL METHODAugust 2024January 2025Allow500NoNo
18838100TURBOMACHINE FOR AN AIRCRAFTAugust 2024March 2025Allow700NoNo
18836448HEATING TURBOMACHINE FOR A FUEL-CONDITIONING SYSTEM CONFIGURED TO SUPPLY AN AIRCRAFT TURBOSHAFT ENGINE WITH FUEL FROM A CRYOGENIC TANKAugust 2024June 2025Allow1000YesNo
18796453CMC COMBUSTOR DEFLECTORAugust 2024March 2025Allow701YesNo
18795021NACELLE INLET STRUCTURES, ENGINE ASSEMBLIES AND VEHICLES INCLUDING THE SAME, AND RELATED METHODSAugust 2024May 2025Allow920NoNo
18794116DUCTING ARRANGEMENT FOR A GAS TURBINE ENGINEAugust 2024May 2025Allow1011NoNo
18793170CRYOGENIC BOTTOMING CYCLE WITH VARIABLE FLUID MIXTUREAugust 2024February 2025Allow700NoNo
18793126CRYOGENIC FUEL SEMI-CLOSED INJECTION COOLED BOTTOMING CYCLEAugust 2024March 2025Allow800NoNo
18792356AIR CONDUCTION SYSTEMAugust 2024June 2025Allow1110YesNo
18834516A FUEL NOZZLE FOR A GAS TURBINE, COMBUSTOR INCLUDING THE FUEL NOZZLE, AND GAS TURBINEJuly 2024June 2025Allow1110YesNo
18787458AIRCRAFT AIR INTAKE COMPRISING AN OUTER WALL AND FRONT AND REAR FRAMES LINKED BY AT LEAST ONE JOINING ELEMENT DISTINCT FROM THE OUTER WALLJuly 2024May 2025Allow1010NoNo
18784568TURBOSHAFT ENGINEJuly 2024February 2025Allow710NoNo
18782262COMBUSTION CHAMBER MODULE HAVING AN ANNULAR COMBUSTION CHAMBERJuly 2024April 2025Allow910NoNo
18780689COMBUSTION DEVICE AND GAS TURBINE SYSTEMJuly 2024June 2025Allow1120NoNo
18778405FUEL CELL TURBOELECTRIC FAN FOR AN AIRCRAFTJuly 2024March 2025Allow810NoNo
18774773INTEGRATED VEHICLE FLUIDS WITH HOT GAS LINE AND COLD GAS LINE MERGING TO INCREASE ENTHALPYJuly 2024January 2025Allow600NoNo
18772636PROPULSION ASSEMBLY FOR AN AIRCRAFTJuly 2024March 2025Allow800NoNo
18770742BUTTERFLY VALVEJuly 2024January 2025Allow600NoNo
18728050PHOTON DRIVE AND PHOTON TURBINEJuly 2024July 2025Allow1210YesNo
18768665TURBINE ENGINE COMBUSTOR WITH A DILUTION PASSAGEJuly 2024May 2025Allow1110NoNo
18768015ACTUATION MECHANISMJuly 2024February 2025Allow800NoNo
18767604THERMAL IMPACT OF GAS STORAGEJuly 2024March 2025Allow800NoNo
18727215CONTROL METHOD FOR GAS TURBINE COMBUSTOR AND CONTROL DEVICE FOR GAS TURBINE COMBUSTORJuly 2024June 2025Allow1210NoNo
18726923THRUST REVERSER COMPRISING MOVABLE CASCADES AND A SEALING MEMBRANEJuly 2024April 2025Allow1010NoNo
18726349RECOVERED-CYCLE TURBOSHAFT ENGINEJuly 2024February 2025Allow800YesNo
18760805COMBINED HEAT AND POWER SYSTEM USING AND PRODUCING CO2 AND METHOD OF OPERATIONJuly 2024June 2025Allow1210NoNo
18755155GAS TURBINE ENGINEJune 2024May 2025Allow1120YesNo
18753128GAS TURBINE ENGINE HEAT EXCHANGEJune 2024December 2024Allow610YesNo
18753121GAS TURBINE FUEL TEMPERATUREJune 2024April 2025Allow1020YesNo
18753446FUELDRAULIC HEAT MANAGEMENT SYSTEMJune 2024April 2025Allow1030YesNo
18753092OPERATING A GAS TURBINE ENGINEJune 2024October 2024Allow410NoNo
18753081FUEL CHARACTERISTICJune 2024April 2025Allow930NoNo
18753264METHOD OF OPERATING A GAS TURBINE ENGINEJune 2024November 2024Allow510YesNo
18753089GAS TURBINE ENGINEJune 2024May 2025Allow1111YesNo
18753195GAS TURBINE FUEL RETURN LINEJune 2024March 2025Allow811YesNo
18753237GAS TURBINE TEMPERATURE SENSORJune 2024January 2025Allow710YesNo
18753116FUEL SUPPLY SYSTEMJune 2024June 2025Allow1220YesNo
18723678COMBUSTOR OF GAS TURBINE INCLUDING A FIXTURE THAT ATTACHES A LINER TO AN OUTER WALL HAVING A COOLING AIR PASSAGEJune 2024June 2025Allow1210YesNo
18750497ANNULAR DOME ASSEMBLY FOR A COMBUSTORJune 2024May 2025Allow1110NoNo
18745637TURBINE ENGINE SUPPORT STRUCTURE WITH AIRFLOW PORTSJune 2024April 2025Allow1010YesNo
18742458AIRCRAFT NACELLE EQUIPPED WITH AT LEAST ONE THRUST REVERSAL DEVICE COMPRISING AT LEAST ONE LONGITUDINAL DEFLECTOR CONFIGURED TO HOUSE A LONGITUDINAL ACTUATORJune 2024May 2025Allow1110YesNo
18738326SYSTEMS AND METHODS OF GENERATING POWER USING A HYDROGEN FUEL SYSTEMJune 2024May 2025Allow1120YesNo
18738916HIGH SHEAR SWIRLER FOR GAS TURBINE ENGINEJune 2024February 2025Allow810NoNo
18737656EXTENDED BULKHEAD PANELJune 2024April 2025Allow1010YesNo
18735712DUAL CYCLE INTERCOOLED HYDROGEN ENGINE ARCHITECTUREJune 2024June 2025Allow1210NoNo
18734131GAS TURBINE ENGINEJune 2024April 2025Allow1010YesNo
18734201SYSTEM AND METHOD FOR BLENDING MULTIPLE FUELSJune 2024March 2025Allow910NoNo
18716550FUEL DISTRIBUTION ASSEMBLY FOR A TURBOMACHINEJune 2024February 2025Allow900NoNo
18734336SYSTEM AND METHOD FOR BLENDING MULTIPLE FUELSJune 2024February 2025Allow810NoNo
18715796HIGH-POWER HYBRID-ELECTRIC PROPULSION SYSTEMS AND METHODSJune 2024June 2025Abandon1310NoNo
18731709LIQUID ROCKET ENGINE INJECTOR WITH VARIABLE FLOW AREAJune 2024March 2025Allow910NoNo
18678576CIRCUMFERENTIAL FLOW CONDENSER ARRANGEMENT FOR AN AIRCRAFT PROPULSION SYSTEMMay 2024February 2025Allow910NoNo
18678605STEAM-INJECTED ENGINE HEAT EXCHANGER ARRANGEMENTMay 2024October 2024Allow500YesNo
18677200TURBINE ENGINE HAVING A REVERSE FLOW ANNULAR VORTEX COMBUSTORMay 2024January 2025Allow810NoNo
18675809GAS TURBINE ENGINE COMPRESSION SYSTEM WITH CORE COMPRESSOR PRESSURE RATIOMay 2024March 2025Allow1010NoNo
18674317ION PROPULSION PLASMA CATHODE ASSEMBLYMay 2024March 2025Allow1010YesNo
18673559COMBUSTOR SIZE RATING FOR A GAS TURBINE ENGINE USING HYDROGEN FUELMay 2024June 2025Allow1311YesNo
18673532COMBUSTOR SIZE RATING FOR A GAS TURBINE ENGINE USING HYDROGEN FUELMay 2024May 2025Allow1211YesNo
18673577COMBUSTOR SIZE RATING FOR A GAS TURBINE ENGINE USING HYDROGEN FUELMay 2024July 2025Allow1311YesNo
18712427GAS TURBINE PLANT, METHOD FOR OPERATING SAME, AND METHOD FOR MODIFYING SAMEMay 2024March 2025Allow1001YesNo
18670336System and Method for a Frac SystemMay 2024June 2025Allow1320NoNo
18669146ADVANCED ELECTRIC RESISTANCE THERMAL PROPULSION SYSTEMSMay 2024December 2024Allow711YesNo
18668829T-HEAD BOLTS OR HOLLOW FLANGED BUSHING WITH ONE THREAD OR GROOVED END IN A MULTI-LINER ARRANGEMENTMay 2024January 2025Allow810NoNo
18666193LIMITED FLOW THRUST REVERSER ACTUATINGMay 2024March 2025Allow1010YesNo
18710678HYDROCARBON PRODUCTION SYSTEM WITH REDUCED CARBON DIOXIDE EMISSIONMay 2024April 2025Allow1110NoNo
18710368HEAT ENGINE SYSTEM COMPRISING A RESERVOIR FOR RECEIVING AND SUPPLYING A WORKING FLUID FROM AND TO A COMPRESSOR VIA A BLEED VALVE AND AN INTAKE VALVEMay 2024January 2025Allow810YesNo
18665376GAS TURBINE PLANT WITH AMMONIA DECOMPOSITION SYSTEMMay 2024November 2024Allow600NoNo
18663691DEPLOYABLE INLET ASSEMBLY FOR AERIAL VEHICLEMay 2024September 2024Allow400NoNo
18663599AIRCRAFT HEAT MANAGEMENTMay 2024May 2025Allow1200YesNo
18663324GAS TURBINE ENGINE COMBUSTOR WITH OPENINGSMay 2024March 2025Allow1020YesNo
18662660DUAL FUEL GAS TURBINE COMBUSTION CHAMBER MODULE HAVING AN ANNULAR COMBUSTION CHAMBERMay 2024June 2025Allow1310NoNo
18660463COMBUSTOR SIZE RATING FOR A GAS TURBINE ENGINE USING HYDROGEN FUELMay 2024April 2025Allow1111YesNo
18660766ACTUATABLE AIRFLOW SPLITTER FOR AN AIRCRAFT POWERPLANTMay 2024January 2025Allow910NoNo
18659371AXIAL FUEL STAGE INJECTOR CREATING AIR CURTAINMay 2024February 2025Allow1000YesNo
18659511COMBUSTOR INCLUDING A HEAT SHIELD FOR A TURBINE ENGINEMay 2024January 2025Allow801YesNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 3741.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
501
Examiner Affirmed
357
(71.3%)
Examiner Reversed
144
(28.7%)
Reversal Percentile
30.6%
Lower than average

What This Means

With a 28.7% reversal rate, the PTAB affirms the examiner's rejections in the vast majority of cases. This reversal rate is below the USPTO average, indicating that appeals face more challenges here than typical.

Strategic Value of Filing an Appeal

Total Appeal Filings
967
Allowed After Appeal Filing
283
(29.3%)
Not Allowed After Appeal Filing
684
(70.7%)
Filing Benefit Percentile
29.4%
Lower 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, 29.3% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is below the USPTO average, suggesting that filing an appeal has limited effectiveness in prompting favorable reconsideration.

Strategic Recommendations

⚠ Appeals to PTAB face challenges. Ensure your case has strong merit before committing to full Board review.

⚠ Filing a Notice of Appeal shows limited benefit. Consider other strategies like interviews or amendments before appealing.

Art Unit 3741 - Prosecution Statistics Summary

Executive Summary

Art Unit 3741 is part of Group 3740 in Technology Center 3700. This art unit has examined 16,273 patent applications in our dataset, with an overall allowance rate of 75.7%. Applications typically reach final disposition in approximately 35 months.

Comparative Analysis

Art Unit 3741's allowance rate of 75.7% places it in the 42% percentile among all USPTO art units. This art unit has a below-average allowance rate compared to other art units.

Prosecution Patterns

Applications in Art Unit 3741 receive an average of 1.77 office actions before reaching final disposition (in the 45% percentile). The median prosecution time is 35 months (in the 22% percentile).

Strategic Considerations

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

  • The art unit's allowance rate suggests a more challenging examination environment compared to the USPTO average.
  • With fewer office actions than average, plan for relatively streamlined prosecution.
  • The median prosecution time is longer 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.