USPTO Art Unit 1773 Prosecution Statistics

Art Unit Information

Art Unit: 1773
Group: 1770
Tech Center: 1700
Total Cases: 13,882
Last Active: November 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19385233PROCESS AND SYSTEM FOR SIMULTANEOUS NITRIFICATION AND DENITRIFICATIONNovember 2025January 2026Allow300YesNo
19300934GRAFTED POLYAMIDE MEMBRANE FOR NANOFILTRATION APPLICATIONSAugust 2025November 2025Allow300NoNo
19269585Apparatus and Method for Purification of Gas MixturesJuly 2025September 2025Allow200NoNo
19242957SYSTEM AND METHOD FOR SOFTENING HIGH-SALINITY WATER VIA SELF-INDUCED CALCIUM BICARBONATE CRYSTALLIZATION IN FLUIDIZED BEDJune 2025November 2025Allow510NoNo
19239827CONTROL METHOD FOR DELAYING NANOFILTRATION MEMBRANE ALUMINUM FOULING OF WATER TREATMENT SYSTEMJune 2025October 2025Allow410NoNo
19231950Systems and Methods for Production of Potable Water By Recycling Processed Wastewater StreamsJune 2025October 2025Allow510YesNo
19220224IN-SITU MYCOREMEDIATION SYSTEM AND PROCESSMay 2025November 2025Allow620NoNo
19216086METHOD FOR REMOVING HEAVY METAL IONS FROM WATERMay 2025July 2025Allow210YesNo
19216169METHOD FOR ISOLATING A HEAVY METAL ION FROM AN AQUEOUS SOLUTIONMay 2025July 2025Allow210YesNo
19210917AIR CLEANER AND FILTRATION ASSEMBLIESMay 2025August 2025Allow310NoNo
19210888FILTER ELEMENTS AND ASSEMBLIESMay 2025July 2025Allow200NoNo
19193821Cleaning DeviceApril 2025November 2025Allow611NoNo
19190876POLYPROPYLENE BAG SORBENT DEVICEApril 2025June 2025Allow100YesNo
19175661Methods and Systems of Iodine Capture from Aqueous SolutionsApril 2025August 2025Allow510YesNo
19174448DUAL METHOD AND SYSTEM FOR THE LOW-COST ELIMINATION OF SUSPENDED PARTICLES FROM A BODY OF WATER TO MAINTAIN WATER QUALITY SUITABLE FOR DIRECT CONTACT RECREATIONAL ACTIVITIESApril 2025July 2025Allow310NoNo
19087002PLASMA ACTIVATED WATER PRODUCTION WITH MEMBRANE CONCENTRATIONMarch 2025September 2025Allow611NoNo
19082480Integrated Method and Apparatus for Treatment of Produced WaterMarch 2025November 2025Allow810YesNo
19083397DOCKING STATION FOR CLEANING ROBOT AND CLEANING SYSTEMMarch 2025December 2025Allow810YesNo
19083419WASTEWATER TREATMENT DEVICE, DOCKING STATION FOR A CLEANING ROBOT AND CLEANING SYSTEMMarch 2025November 2025Allow810NoNo
19077074SPRAY HEADMarch 2025November 2025Allow811NoNo
19073425NANOCOMPOSITE FOR WATER DECONTAMINATIONMarch 2025May 2025Allow200NoNo
19062089METHOD AND SYSTEM FOR TREATING WASTEWATER FROM THERMAL POWER PLANTFebruary 2025July 2025Allow510YesNo
19061684PHOTODEGRADATION OF CONTAMINANTS VIA A NANOCOMPOSITEFebruary 2025August 2025Allow610NoNo
19052231WASTEWATER TREATMENT DEVICE, DOCKING STATION AND CLEANING SYSTEMFebruary 2025December 2025Allow1011NoNo
19034963RECYCLING OF GAS IN CONFINED PLUNGING LIQUID JET REACTORJanuary 2025August 2025Allow610NoNo
19031976DEPLOYMENT OF STRUCTURALLY ALTERED GASEOUS WATER MOLECULES USING DIRECT INJECTION AND COARSE, FINE, MICRO, AND NANOBUBBLE DIFFUSION INTO LIQUID, SOLID, GASEOUS, AND MULTIPHASE SYSTEMSJanuary 2025July 2025Allow610YesNo
19016465FLUID FILTER AND HOUSING FOR THE FLUID FILTERJanuary 2025July 2025Allow701NoNo
19015951METHODS AND SYSTEMS OF PHOTOSENSITIZER RECOVERY FOR IMPROVED PFAS DESTRUCTIONJanuary 2025September 2025Allow811NoNo
18999666INTEGRATED ELECTROCOAGULATION DESALINATION PROCESS WITH CARBON DIOXIDE CAPTURE AND SOLID RECOVERYDecember 2024June 2025Allow610YesNo
18975274REMOTE-OPERATED FLUSHING SYSTEMDecember 2024June 2025Allow610NoNo
18954882FLAT PUSH HOT CAR FOR FOUNDRY COKE AND ASSOCIATED SYSTEMS AND METHODSNovember 2024May 2025Allow500YesNo
18941364Constructed Wetland Structure and Methods for Preparing and Using Carbon SourceNovember 2024November 2025Allow1321YesNo
18936661SYSTEMS AND METHODS FOR DESALINATION OF LIQUIDSNovember 2024January 2026Allow1510NoNo
18933383FILTRATION SYSTEM WITH IMPROVED STANDPIPE DESIGNOctober 2024December 2025Allow1441NoNo
18907525SLUDGE PROCESSING AND TREATMENT METHODSOctober 2024January 2026Allow1521YesNo
18899337METHOD FOR EXTRACTING OILS FROM SAUCES WHILE SIMULTANEOUSLY DETERMINING FAT CONTENT, PEROXIDE VALUE, AND ACID VALUESeptember 2024March 2025Allow510YesNo
18898713RAW WATER FILTERING DEVICESeptember 2024February 2025Allow510YesNo
18844061WATER TREATMENT SYSTEM, AERATION AMOUNT CONTROL DEVICE, AND AERATION AMOUNT CONTROL METHODSeptember 2024February 2026Abandon1730YesNo
18819731AUTOMATED SKIMMER SYSTEMAugust 2024December 2025Allow1520NoNo
18816355THERMAL DRIVEN WATER DESALINATION SYSTEM USING FORWARD OSMOSISAugust 2024July 2025Allow1021YesNo
18799952MICROORGANISM GENERATION SYSTEM FOR SLUDGE-FREE AEROBIC TANK AND MANUFACTURE METHOD THEREFORAugust 2024April 2025Allow811NoNo
18795966STORMWATER SYSTEM FOR MANAGING AND CONTROLLING SEDIMENT CAPTUREAugust 2024August 2025Allow1230YesNo
18795241MATERIAL REGULATING TRAP FOR SEWER CONNECTIONAugust 2024July 2025Allow1241YesNo
18791747AIR TREATMENT APPARATUSAugust 2024October 2025Allow1500YesNo
18788132AIR FILTERJuly 2024October 2024Allow200YesNo
18789434WATER TREATMENT SYSTEM USING REVERSE OSMOSIS PROCESS FOR HIGH SALINITY LOW TEMPERATURE WATERJuly 2024January 2025Allow510YesNo
18787413Multi-Mode Piston: A Chemical Engineering Building BlockJuly 2024December 2025Allow1710YesNo
18774222UNDERDRAIN FOR WASTEWATER FILTRATION CONTAINERJuly 2024February 2025Allow710NoNo
18728831METHOD FOR ASSEMBLING A BIPOLAR MEMBRANE, BIPOLAR MEMBRANE, AND USE OF SAID BIPOLAR MEMBRANEJuly 2024March 2025Allow810NoNo
18771337Methods and Systems of Iodine Capture from Aqueous SolutionsJuly 2024November 2024Allow410YesNo
18771407Methods and Systems for Recycling Materials During PFAS DestructionJuly 2024July 2025Allow1221NoNo
18769454Universal Air Purification SystemJuly 2024December 2025Abandon1720YesNo
18770467Chromatography Column and Method of Assembling the SameJuly 2024April 2025Allow910NoNo
18769573Integrated Micro-Photoionization Detector With An Ultrathin Ultraviolet Transmission WindowJuly 2024December 2025Abandon1810NoNo
18767495SURFACE CLEANING APPARATUSJuly 2024March 2025Allow800YesNo
18766208METHOD FOR WASTEWATER TREATMENT CONTROL THROUGH MICROORGANISM METABOLIC PATHWAY OPTIMIZATIONJuly 2024September 2025Allow1410NoNo
18764841HAND VACUUM CLEANERJuly 2024September 2025Allow1400YesNo
18726793PROTECTIVE ISOLATION HOODJuly 2024November 2024Allow400NoNo
18760098Filter and Filter Assembly for Paint Overspray CaptureJuly 2024May 2025Allow1010NoNo
18738888SPLIT FLOW AXIAL CRANKCASE SEPARATORJune 2024February 2025Allow810NoNo
18736813CERAMIC CATION EXCHANGE MATERIALSJune 2024June 2025Allow1210NoNo
18734716ROBOTIC VACUUM CLEANER WITH DIRT ENCLOSING MEMBER AND METHOD OF USING THE SAMEJune 2024January 2025Allow800YesNo
18732805SYSTEM AND METHOD FOR PERFORMING SEPARATION AND DEHYDROXYLATION OF FUMED SILICA SOOT PARTICLESJune 2024July 2025Allow1410YesNo
18731938FILTER CARTRIDGES; AIR CLEANER ASSEMBLIES; HOUSINGS; FEATURES; COMPONENTS; AND, METHODSJune 2024March 2025Allow910NoNo
18731615DIAGNOSTIC METHODS AND APPARATUS FOR ELECTRODIALYSISJune 2024January 2026Abandon1910YesNo
18675188REVERSE OSMOSIS MEMBRANE AND METHOD OF PRODUCING THE SAMEMay 2024November 2025Abandon1810NoNo
18675650Atomic Scale Paired Electron Bonding, Adsorption and Chelation for Removing Preservative Biocidal Agents from Rx and OTC Ophthalmic Therapeutics and Other Medical SolutionsMay 2024December 2025Abandon1910NoNo
18672395HOLLOW FIBER NANOFILTRATION MEMBRANE SYSTEM AND CONTROL METHOD THEREOFMay 2024August 2024Allow300NoNo
18671853ENERGY EFFICIENT DECENTRALIZED WASTEWATER REUSE SYSTEM INCORPORATING MULTIPLE STAGES OF AEROBIC BIOREACTORS AND RECIRCULATION FOR ORGANICS AND NITROGEN REDUCTIONMay 2024April 2025Allow1100YesNo
18669516FILTER MEDIA AND ELEMENTSMay 2024September 2025Allow1620NoNo
18668865Fluid Drainage System with Textured Core SheetsMay 2024March 2025Allow1000NoNo
18667610SURFACE CLEANING APPARATUSMay 2024December 2024Allow700YesNo
18663457AIR CLEANER BYPASS ASSEMBLY AND METHOD OF OPERATINGMay 2024March 2025Allow1020YesNo
18661533FILTER DEVICEMay 2024June 2025Allow1410NoNo
18659199Debris Management System for Both Positive and Negative Pressure Dust CollectorsMay 2024October 2024Allow520YesNo
18708147SYSTEMS AND METHOD FOR ELIMINATING AIRBORNE CONTAMINANTSMay 2024November 2025Allow1821YesYes
18656688HOT WATER CART CONDITIONING SYSTEM AND METHODMay 2024June 2025Allow1310NoNo
18656202HEMODIALYSIS SYSTEM INCLUDING A DISPOSABLE SET AND A DIALYSIS INSTRUMENTMay 2024September 2025Allow1610YesNo
18656518THERMOMECHANOCHEMICAL WASTE TREATMENTMay 2024May 2025Allow1210NoNo
18654819STERILE AND/OR PURIFIED FLUID AND/OR SOLUTION DELIVERY SYSTEMMay 2024March 2025Allow1110NoNo
18707060FILTRATION DEVICE AND FILTRATION SYSTEMMay 2024September 2025Allow1621YesNo
18653214POLYMER-HYDROXYAPATITE COMPOSITE MEMBRANESMay 2024May 2025Allow1210NoNo
18653090Water Filter and Medium ThereforMay 2024April 2025Abandon1111NoNo
18652446PREVENTION OF SILICA FOULING IN GEOTHERMAL BRINEMay 2024October 2025Allow1840YesNo
18652516LOW COST AND SANITARY EFFICIENT METHOD THAT CREATES TWO DIFFERENT TREATMENT ZONES IN LARGE WATER BODIES TO FACILITATE DIRECT CONTACT RECREATIONAL ACTIVITIESMay 2024April 2025Allow1110YesNo
18648525Medicament Preparation and Treatment Devices, Methods, and SystemsApril 2024April 2025Allow1210NoNo
18647159CROSSFLOW SETTING DEVICES AND METHODS OF USEApril 2024August 2025Allow1610NoNo
18645691FUNCTIONALIZED FILTERSApril 2024October 2025Abandon1810NoNo
18644905AIR CLEANER ASSEMBLIES AND METHODS OF USEApril 2024June 2025Allow1420NoNo
18644385FILTER FRAME WITH FOLDABLE SEALING FLAPApril 2024February 2025Allow1010NoNo
18642121WATER MANAGEMENT SYSTEMApril 2024October 2025Abandon1810NoNo
18640881SURFACE CLEANING APPARATUSApril 2024November 2024Allow700YesNo
18638847SYSTEMS AND METHODS FOR CREATING AND SEGMENTING TREATMENT PROCESSESApril 2024January 2026Allow2110YesNo
18639529BIOSOLIDS QUALITY AND DEWATERABILITYApril 2024May 2025Allow1310NoNo
18639492ENHANCED FOAM REMOVAL OF TOTAL SUSPENDED SOLIDS AND MULTIPLY CHARGED CATIONS FROM AQUEOUS OR AQUEOUS/OIL MIXED PHASE VIA INCREASED VISCOELASTICITYApril 2024May 2025Allow1320NoNo
18637779METHOD AND APPARATUS FOR MULTI-DESELECTION IN WASTEWATER TREATMENTApril 2024December 2025Allow2011YesNo
18635692DEVICE FOR GAS-SOLID SEPARATIONApril 2024March 2025Allow1130NoNo
18631026SKID-MOUNTED FLUE GAS INJECTION EQUIPMENT AND METHOD WITH ADJUSTABLE CO2 ENRICHMENT DEGREEApril 2024June 2024Allow300NoNo
18629612APPARATUS FOR TRENDING AUTOMATED PERITONEAL DIALYSIS TREATMENTSApril 2024August 2025Allow1710YesNo
18626803FILTER AND MANUFACTURING METHOD THEREOFApril 2024November 2024Allow800NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 1773.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
232
Examiner Affirmed
150
(64.7%)
Examiner Reversed
82
(35.3%)
Reversal Percentile
64.5%
Higher than average

What This Means

With a 35.3% reversal rate, the PTAB reverses the examiner's rejections in a meaningful percentage of cases. This reversal rate is above the USPTO average, indicating that appeals have better success here than typical.

Strategic Value of Filing an Appeal

Total Appeal Filings
898
Allowed After Appeal Filing
291
(32.4%)
Not Allowed After Appeal Filing
607
(67.6%)
Filing Benefit Percentile
51.3%
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, 32.4% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is above the USPTO average, suggesting that filing an appeal can be an effective strategy for prompting 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 is strategically valuable. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Art Unit 1773 - Prosecution Statistics Summary

Executive Summary

Art Unit 1773 is part of Group 1770 in Technology Center 1700. This art unit has examined 13,882 patent applications in our dataset, with an overall allowance rate of 69.7%. Applications typically reach final disposition in approximately 30 months.

Comparative Analysis

Art Unit 1773's allowance rate of 69.7% places it in the 31% 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 1773 receive an average of 1.91 office actions before reaching final disposition (in the 51% percentile). The median prosecution time is 30 months (in the 53% 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 more 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.