USPTO Art Unit 3646 Prosecution Statistics

Art Unit Information

Art Unit: 3646
Group: 3640
Tech Center: 3600
Total Cases: 9,472
Last Active: August 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19297550STABILIZATION OF Z-PINCH WITH DIRECTED RADIO FREQUENCY EXCITATIONAugust 2025March 2026Allow710NoNo
19244838ANTENNA ARRANGEMENTS FOR MEASUREMENT OF ANGLE OF ARRIVAL OVER 360 DEGREESJune 2025September 2025Allow200NoNo
19232997RADAR-TRANSPARENT THREADED MOUNT SYSTEM FOR LEVEL MONITORING DEVICEJune 2025November 2025Allow510NoNo
19210040OPTICALLY TRANSPARENT MICROWAVE ABSORBER FOR STEALTH APPLICATIONSMay 2025October 2025Allow511NoNo
19203304PROCESS FOR PRODUCTION OF ACTINIUM-225May 2025January 2026Abandon810NoNo
19203349PROCESS FOR THE REPEATED IRRADIATION OF A RADIUM TARGETMay 2025February 2026Allow920YesNo
19175564Method for detecting the presence of a liquid in a container by means of a near-field communication circuitApril 2025June 2025Allow310NoNo
19096554SEMICONDUCTOR SYSTEM WITH WAVEGUIDE ASSEMBLY WITH RF SIGNAL IMPEDANCE CONTROLLABLE BY APPLIED ELECTROMAGNETIC RADIATIONMarch 2025May 2025Allow200NoNo
18831438ATMOSPHERIC OPTICAL DISTORTION CORRECTING SYSTEM AND METHODJanuary 2025September 2025Allow810NoNo
19024353CARBON-BASED CONDUCTIVE FILM-BASED ULTRALIGHT WIDE-ANGLE ABSORBING METAMATERIAL WITH FULL-FREQUENCY ABSORPTION WITHIN 2-18 GHz AND PREPARATION METHOD THEREOFJanuary 2025June 2025Allow400NoNo
19016075DETECTION METHOD OF SPACEBORNE GLOBAL NAVIGATION SATELLITE SYSTEM-REFLECTOMETRY ORIGINAL INTERMEDIATE FREQUENCY COHERENT REFLECTION SIGNALS IN OCEAN, POLAR AND INLAND WATER AREASJanuary 2025July 2025Allow710NoNo
18948199CONTAINMENT FOR A NUCLEAR REACTORNovember 2024October 2025Allow1121YesNo
18945340METHOD FOR CONTROLLING PLASMA EDGE FUEL PARTICLE BACKFLOW BY POWDER FEEDBACK INJECTIONNovember 2024February 2026Allow1530NoNo
18939916Using Magnetic-Sensor Data to Correct for INS DriftNovember 2024January 2026Allow1420NoNo
18921964System For Heat Transfer Between Primary And Secondary Fluid Circuits Within A Diffusion-Bonded Pressure Vessel Wall For A Nuclear ReactorOctober 2024July 2025Allow920YesNo
18858182Method for Extracting Technetium-99m From Low Specific Activity Molybdenum-99, Method for Producing Physiological Saline Solution Containing Technetium-99m Using Extraction Method Thereof, and System for Recovering Technetium-99m From Natural MolybdenumOctober 2024June 2025Allow811NoNo
18910497ZERO-BALANCE PHASE MEASUREMENT CIRCUITOctober 2024December 2024Allow300NoNo
18851353DETECTING AND SUPPRESSING AMBIGUITIES IN SYNTHETIC APERTURE RADAR DATA AND IMAGESSeptember 2024April 2025Allow710YesNo
18795873CALIBRATION OF POWER MONITORS IN MOLTEN SALT REACTORSAugust 2024June 2025Allow1011NoNo
18792690LITHIUM DETECTION TECHNIQUES USING NEUTRONS AND/OR ALPHA PARTICLESAugust 2024February 2025Allow711YesNo
18792371REDUCED NEUTRON EMISSION TARGET FOR FUSION ENERGY GENERATIONAugust 2024June 2025Allow1011NoNo
18791042Systems and Methods for Handheld Single Chip Submillimeter RadarsJuly 2024May 2025Allow1011YesNo
18781312Method and Device for Providing Engagement Information Based on Occurrence of Non-Linear Maneuver of Aircraft, and Storage Medium Storing Instructions to Perform Method for Providing Engagement InformationJuly 2024November 2025Allow1510NoNo
18730117A Linear Motor For Use In A Molten Salt Nuclear Reactor And A Valve For Use In A Molten Salt Nuclear ReactorJuly 2024February 2026Abandon1921YesNo
18774871Multi-Static Coherent LiDARJuly 2024February 2025Allow700NoNo
18770468ANGLE OF ARRIVAL OF WIRELESS LOCAL AREA NETWORK DEVICES USING A SWITCHED BEAM ANTENNAJuly 2024October 2024Allow300NoNo
18769565Fluid Level Control System For A Molten Fuel Salt Sampling Tank In A Nuclear Reactor SystemJuly 2024September 2025Allow1411NoNo
18768120SEPARATION OF RARE EARTH ELEMENTS BY MEANS OF PHYSICAL CHEMISTRYJuly 2024April 2025Allow911YesNo
18763158ION COLLIDER FOR NUCLEAR FUSIONJuly 2024February 2025Allow711YesNo
18758284AUTOMATIC LEVELING MAINTENANCE PLATFORM FOR HIGH-TEMPERATURE GAS COOLED REACTORJune 2024January 2025Allow600YesNo
18756832METHOD FOR OPERATING NUCLEAR REACTOR FOR HEAT AND POWER GENERATIONJune 2024June 2025Allow1111NoNo
18756611NUCLEAR REACTOR SYSTEM AND METALLIC COOLANT COMPOSITIONJune 2024November 2025Allow1711YesNo
18754063UWB NLOS SIGNAL RECOGNITION METHOD BASED ON THE FIRST PATH OF CIRJune 2024February 2025Allow810NoNo
18722164NUCLEAR REACTOR FOR HEAT AND POWER GENERATIONJune 2024July 2025Allow1211YesNo
18744364HEAT EXCHANGER IN A BOREHOLE RECEIVES HEAT THROUGH A ROCK FORMATION FROM ANOTHER BOREHOLE WHICH INCLUDES A NUCLEAR REACTORJune 2024July 2025Allow1330YesNo
18740104Rapid, Automatic Directional Beam Alignment in 5G/6G NetworksJune 2024January 2025Allow710NoNo
18737614GPS TRACKING SYSTEMJune 2024October 2025Allow1710YesNo
18673603SIGNAL DETECTION AND DENOISING SYSTEMSMay 2024November 2025Allow1810NoNo
18670643LOW-ALTITUDE FREQUENCY DOMAIN ELECTROMAGNETIC DETECTION DEVICE AND ELECTROMAGNETIC DETECTION METHODMay 2024December 2024Allow710NoNo
18710625SYSTEMS AND METHODS FOR REMOTELY TRACKING LIFE SIGNS WITH A MILLIMETER-WAVE RADARMay 2024March 2026Allow2200NoNo
18664909PASSIVE MULTISPECTRAL SCANNER THAT USES RECURSIVE ADAPTIVE SAMPLINGMay 2024July 2024Allow200NoNo
18663976FISSION PRODUCT EXTRACTION SYSTEM AND METHODS OF USE THEREOFMay 2024June 2025Allow1311NoNo
18659117WAVE SPECTRUM CALCULATION METHOD BASED ON GNSS WAVE MEASURING BUOYMay 2024May 2025Allow1220NoNo
18658993MAGNETIC CONFINEMENT FUSION REACTORMay 2024October 2024Allow510NoNo
18657769Fusion Reactor Superconducting Magnet SystemMay 2024January 2026Allow2000YesNo
18656521TRAJECTORY DETERMINATION SYSTEM USING POSITIONAL SENSING TO DETERMINE THE MOVEMENT OF PEOPLE OR OBJECTSMay 2024February 2026Abandon2110NoNo
18655365SYSTEM AND METHOD FOR RECONVERGING GNSS POSITION ESTIMATESMay 2024July 2025Abandon1410NoNo
18646218RADAR APPARATUSApril 2024July 2025Allow1500NoNo
18644443Separation of Actinium from an Irradiated Source Material Including ThoriumApril 2024March 2025Allow1100NoNo
18642358SOLID TARGET SYSTEM FOR RADIONUCLIDE PREPARATIONApril 2024June 2024Allow200NoNo
18642639TRAJECTORY DETERMINATION SYSTEM USING POSITIONAL SENSING TO DETERMINE THE MOVEMENT OF PEOPLE OR OBJECTSApril 2024February 2026Abandon2210NoNo
18703566PRESENCE DETECTION DEVICE WITH A RADIO ANTENNA, FOR A MOTOR VEHICLEApril 2024February 2026Allow2200NoNo
18703455NUCLEAR REACTOR SYSTEM INSIDE A BOREHOLEApril 2024March 2026Allow2321YesNo
18640934COORDINATED FUELING SYSTEM AND METHOD SATISFYING THOUSAND-SECOND PULSED PLASMA DISCHARGEApril 2024December 2024Allow820NoNo
18640646Vehicle Routing Based on Availability of Radar-Localization ObjectsApril 2024February 2026Abandon2220YesNo
18638182RADAR APPARATUS AND OPERATING METHOD THEREOFApril 2024March 2026Allow2310YesNo
18636077RYDBERG-MOLECULE-BASED MICROWAVE DIRECTION FINDINGApril 2024August 2025Allow1620NoNo
18632611FUEL SALT SHIPPING SYSTEMApril 2024May 2025Allow1421YesNo
17619120ECCS WITH SELF-CLEANING FILTER SYSTEMApril 2024September 2024Allow3320NoNo
18625677SYSTEMS AND METHODS FOR ENABLING AND UTILIZING RADAR CAPABILITY ON A WIRELESS COMMUNICATIONApril 2024February 2025Allow1100NoNo
18623473COMPACT RADAR SYSTEMApril 2024April 2025Allow1310NoNo
18613264FUSION REACTORMarch 2024June 2025Abandon1501NoNo
18607963MISSILE GUIDANCE SYSTEMMarch 2024March 2025Allow1210NoNo
18691092METHOD FOR OPERATING WIDE-BAND AESAMarch 2024September 2024Allow610NoNo
18600271FUSION REACTOR HAVING NESTED PEBBLE BED BLANKETMarch 2024May 2024Allow200YesNo
18598596SYSTEM AND METHOD FOR RADARMarch 2024December 2024Allow910NoNo
18597375TRAFFIC RADAR SYSTEM WITH PATROL VEHICLE SPEED DETECTIONMarch 2024December 2025Abandon2101NoNo
18687320LINE-OF-SIGHT PAYLOAD DELIVERY SYSTEMFebruary 2024February 2025Abandon1120NoNo
18583272ANGLE OF ARRIVAL OF WIRELESS LOCAL AREA NETWORK DEVICES USING A SWITCHED BEAM ANTENNAFebruary 2024April 2024Allow200NoNo
18442392DETECTION AND ESTIMATION OF SPINFebruary 2024July 2024Allow510YesNo
18437013PASSIVELY-COOLED SPENT NUCLEAR FUEL POOL SYSTEMFebruary 2024August 2025Allow1920YesNo
18430506TRAJECTORY DETERMINATION SYSTEM USING POSITIONAL SENSING TO DETERMINE THE MOVEMENT OF PEOPLE OR OBJECTSFebruary 2024April 2025Allow1410NoNo
18422434Nano-Engineered Materials for LENRJanuary 2024March 2025Abandon1401NoNo
18421173METHOD AND APPARATUS FOR DETERMINING THE ANGLE OF DEPARTUREJanuary 2024January 2025Allow1100NoNo
18416483ANGLE OF ARRIVAL OF PERSONAL AREA NETWORK DEVICES USING A SWITCHED BEAM ANTENNAJanuary 2024July 2024Allow610NoNo
18401172METHOD OF PREPARING A FUSION REACTOR DIVERTOR COMPONENTDecember 2023August 2024Allow711NoNo
18401225METHOD OF CONSTRUCTING A NUCLEAR REACTOR HAVING REACTOR CORE AND CONTROL ELEMENTS SUPPORTED BY REACTOR VESSEL HEADDecember 2023April 2025Allow1510YesNo
18393892ROTATIONAL WIRELESS COMMUNICATION SYSTEMDecember 2023June 2025Allow1810YesNo
18391572PERSON LOCATION DETERMINATION USING MULTIPATHDecember 2023July 2025Allow1910NoNo
18538496LIQUID METAL OR MOLTEN SALT(S) REACTOR INCORPORATING A DECAY HEAT REMOVAL (DHR) SYSTEM THAT REMOVES HEAT THROUGH THE PRIMARY REACTOR VESSEL, COMPRISING A MODULE OF PASSIVELY OR ACTIVELY TRIGGERED PIVOTING FINS LOCATED IN THE GUARD GAPDecember 2023March 2026Abandon2710NoNo
18536193PASSIVE CHEMICAL INJECTION SYSTEM FOR CONTROLLING A NUCLEAR REACTION BY DELIVERING A NEUTRON-ABSORBING CHEMICAL INTO A CONTAINMENT VESSELDecember 2023June 2025Allow1810YesNo
18531158ACTIVE SPIN CONTROLDecember 2023October 2024Allow1010YesNo
18529510DEPLOYMENT METHOD AND SYSTEMS FOR MOLTEN SALT REACTORSDecember 2023October 2025Allow2231YesNo
18523807PHASE-LOCKED LOOP, RADAR SYSTEM AND METHOD FOR RANDOMIZING INITIAL PHASES OF FMCW SIGNALSNovember 2023February 2026Allow2710NoNo
18520115Compact Solid Target for Low Energy Medical CyclotronNovember 2023March 2026Abandon2710NoNo
18564489Molten Salt Nuclear Reactor Core Having a Bulbous ShapeNovember 2023December 2025Allow2431YesNo
18518408NUCLEAR REACTOR PROTECTION SYSTEMS AND METHODSNovember 2023December 2025Allow2531NoNo
18515301RADAR DEVICE, METHOD OF DETECTING FAILURE OF RADAR DEVICE, AND METHOD OF OPERATING RADAR DEVICENovember 2023March 2025Allow1510NoNo
18562305Stochastic Mantle for Magnetic Fusion DevicesNovember 2023April 2025Allow1720YesNo
18513306SEGMENTED REACTION CHAMBER FOR RADIOISOTOPE PRODUCTIONNovember 2023August 2025Allow2111NoNo
18260128Micro Nuclear Reactor Having A Heat Pipe Extending Into A Core Comprising Fuel Particles Mixed With Moderator Particles, Where The Particles Can Be Gravity Discharged From The Core Through A Bottom OutletNovember 2023January 2026Allow3100YesNo
18510832METHOD, SYSTEM, AND INTELLIGENT TERMINAL FOR ONE-BIT QUANTIZATION DIRECTION OF ARRIVAL ESTIMATIONNovember 2023May 2024Allow610NoNo
18508579UWB-BASED IN-VEHICLE 3D LOCALIZATION OF MOBILE DEVICESNovember 2023January 2026Allow2610YesNo
18507246Core of Fast Reactor and Method of Operating Fast ReactorNovember 2023May 2025Abandon1801NoNo
18388841SURFACE WATER MONITORING METHOD AND APPARATUS, COMPUTER DEVICE, AND STORAGE MEDIUMNovember 2023February 2026Allow2710NoNo
18388681ANGULAR VELOCITY VECTOR-BASED POSITIONING SYSTEM AND METHODNovember 2023October 2025Allow2300NoNo
18506083SEMICONDUCTOR SYSTEM WITH WAVEGUIDE ASSEMBLY WITH RF SIGNAL IMPREDANCE CONTROLLABLE BY APPLIED ELECTROMAGNETIC RADIATIONNovember 2023October 2025Allow2300NoNo
18503069TRAJECTORY DETERMINATION SYSTEM USING POSITIONAL SENSING TO DETERMINE THE MOVEMENT OF PEOPLE OR OBJECTSNovember 2023January 2024Allow200NoNo
18387175WIND SPEED PREDICTION DEVICE, WIND SPEED PREDICTION METHOD, AND RADAR DEVICENovember 2023March 2026Allow2810NoNo
18503060TRAJECTORY DETERMINATION SYSTEM USING POSITIONAL SENSING TO DETERMINE THE MOVEMENT OF PEOPLE OR OBJECTSNovember 2023February 2024Allow300NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 3646.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
338
Examiner Affirmed
173
(51.2%)
Examiner Reversed
165
(48.8%)
Reversal Percentile
93.1%
Higher than average

What This Means

With a 48.8% reversal rate, the PTAB reverses the examiner's rejections in a meaningful percentage of cases. 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
698
Allowed After Appeal Filing
222
(31.8%)
Not Allowed After Appeal Filing
476
(68.2%)
Filing Benefit Percentile
48.0%
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, 31.8% 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 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 shows limited benefit. Consider other strategies like interviews or amendments before appealing.

Art Unit 3646 - Prosecution Statistics Summary

Executive Summary

Art Unit 3646 is part of Group 3640 in Technology Center 3600. This art unit has examined 9,472 patent applications in our dataset, with an overall allowance rate of 76.4%. Applications typically reach final disposition in approximately 34 months.

Comparative Analysis

Art Unit 3646's allowance rate of 76.4% places it in the 50% 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 3646 receive an average of 1.89 office actions before reaching final disposition (in the 49% percentile). The median prosecution time is 34 months (in the 34% 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.