USPTO Art Unit 1777 Prosecution Statistics

Art Unit Information

Art Unit: 1777
Group: 1770
Tech Center: 1700
Total Cases: 10,701
Last Active: November 2025

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19382436DESALINATION SYSTEM WITH POLYIMIDE MEMBRANENovember 2025February 2026Allow300YesNo
19333495COMPOSITE FILTER BODYSeptember 2025March 2026Allow610NoNo
19304453CLEANING DEVICEAugust 2025October 2025Allow200NoNo
19282083INTELLIGENT TRICKLING FILTER WATER RECYCLING TECHNOLOGY SUPPORTING ENERGY EFFICIENT EVAPORATIVE COOLING FOR DATA CENTER HEAT DISSIPATIONJuly 2025December 2025Allow500NoNo
19281579METHOD OF PHOTOCATALYTIC DEGRADATION OF A POLLUTANT USING NANOCOMPOSITEJuly 2025September 2025Allow200NoNo
19266138REMOVAL OF WATER POLLUTANT USING CALCIUM METAVANADATE /CALCIUM SILICATE/ GRAPHITE-PHASE CARBON NITRIDE (CaV2O6/CaSiO3/g-C3N4) NANOCOMPOSITEJuly 2025November 2025Allow401YesNo
19256934SELECTIVE EXTRACTION OF THIOPHENE FROM THIOPHENE/N-HEPTANE USING A POLY(VINYL ACETATE)/WATER MEMBRANE SYSTEMJuly 2025August 2025Allow200YesNo
19247547METHOD FOR SEPARATING NONPOLAR HYDROCARBON FROM WATERJune 2025August 2025Allow100YesNo
19243768METHOD FOR CLEANING A FOULED WATER PURIFICATION MEMBRANEJune 2025September 2025Allow300NoNo
19243763METHOD FOR PHOTOCATALYTIC DEGRADATION OF ORGANIC POLLUTANTSJune 2025August 2025Allow200NoNo
19243757POROUS SELF-CLEANING PHOTOCATALYTIC MEMBRANEJune 2025August 2025Allow200NoNo
19243771POROUS WATER DECONTAMINATION MEMBRANEJune 2025September 2025Allow300YesNo
19237046METHOD FOR TREATING POLLUTED ACIDIC WASTEWATER FROM SMELTING WITH ACTIVATED PYRITE CONCENTRATEJune 2025September 2025Allow300NoNo
19229043INTELLIGENT WASTEWATER PURIFICATION AND TREATMENT DEVICEJune 2025August 2025Allow200NoNo
19211681THERMOELECTRIC DISTILLATION APPARATUSMay 2025July 2025Allow210NoNo
19208641METHOD FOR SEPARATING AN OIL-WATER EMULSIONMay 2025October 2025Allow511YesNo
19184946DISTILLATION AND HEAT EXCHANGE APPARATUSApril 2025July 2025Allow210NoNo
19184902AIR GAP DISTILLATION SYSTEM AND HEAT EXCHANGERApril 2025July 2025Allow310NoNo
19183913PREPARATION METHOD FOR REVERSE OSMOSIS MEMBRANE RESISTANT TO HIGH-TEMPERATURE WATER ENVIRONMENTApril 2025June 2025Allow200YesNo
19171790METHODS AND SYSTEMS FOR ORGANIC RECOVERY IN SOLVENT EXTRACTIONApril 2025May 2025Allow100NoNo
19092790INTELLIGENT TRICKLING FILTER WATER RECYCLING TECHNOLOGY SUPPORTING ENERGY EFFICIENT EVAPORATIVE COOLING FOR DATA CENTER HEAT DISSIPATIONMarch 2025July 2025Allow401YesNo
19091518Sand Knockout for Fracking FluidsMarch 2025October 2025Allow711NoNo
19111325BICARBONATE REMOVAL FROM MONOETHYLENE GLYCOL-WATER STREAMSMarch 2025October 2025Allow710YesNo
19110792A DIALYSIS APPARATUS WHICH ULTRA-FILTERS BLOOD AND A RELATED METHODMarch 2025December 2025Allow920NoNo
19071140DEVICES AND METHODS FOR REMOVING CANCER CELLS FROM BLOODSTREAM DURING CANCER METASTASISMarch 2025September 2025Allow620NoNo
19067547NEUTRALIZATION PROCESSING SYSTEM FOR AMMONIA-CONTAINING WASTE FLUID AND NEUTRALIZATION PROCESSING METHOD FOR AMMONIA-CONTAINING WASTE FLUIDFebruary 2025June 2025Allow401NoNo
19064460DEVICE AND SYSTEM FOR WATER DESALINIZATIONFebruary 2025March 2026Allow1210NoNo
19063093CLEANING ROBOT DOCKING STATION AND CLEANING SYSTEM WITH CLEANING ROBOT DOCKING STATIONFebruary 2025June 2025Allow400YesNo
19055052SYSTEM AND PROCESS FOR REDUCING PFAS AND MICROPLASTICS IN BIOSOLIDS USING HYDRODYNAMIC CAVITATION AND FOAM FRACTIONATIONFebruary 2025July 2025Allow510NoNo
19053529Dynamic Adjustment Of Algorithms For Separation And Collection Of Blood ComponentsFebruary 2025July 2025Allow500NoNo
19053143Chromatography System and Couplings ThereforFebruary 2025July 2025Allow510NoNo
19023558Sustainable Water Utilization and Disaster Mitigation SystemJanuary 2025July 2025Allow611NoNo
19016858SYSTEMS AND METHODS OF REMOVING TOXIC SUBSTANCES FROM WATER USING VERMIFILTRATIONJanuary 2025January 2026Allow1221YesNo
19016011COBALT OXIDE AND NICKEL OXIDE DOPED MAGNESIUM ALUMINUM OXIDE (CoO-NiO@MgAl2O4) NANOCOMPOSITE FOR DYE REMOVAL FROM WATERJanuary 2025September 2025Allow811YesNo
19014185SOLID-LIQUID SEPARATION MECHANISM AND SOLID-LIQUID SEPARATION METHOD FOR GRAIN FERMENTATIONJanuary 2025March 2025Allow200NoNo
18992443FOREIGN MATTER REMOVAL DEVICEJanuary 2025October 2025Allow910YesNo
18879470An Equipment for In-situ Restoration of SedimentDecember 2024March 2025Allow300NoNo
19001573MAGNETIC RESPONSE FIBER MATERIAL AND ITS PREPARATION METHOD AND APPLICATIONDecember 2024April 2025Allow401NoNo
18986329LEAK-PROOF GARBAGE BASKET AND WATER SURFACE CLEANING ROBOTDecember 2024October 2025Allow1020NoNo
18964828METHODS AND SYSTEMS FOR TREATING BIOLOGICAL CONTAMINANTSDecember 2024January 2026Allow1321NoYes
18965400METHOD OF RECOVERING LITHIUM FROM A LITHIUM SOURCEDecember 2024August 2025Allow811NoNo
18961941METAL-ORGANIC FRAMEWORKS FOR SELECTIVE ION EXTRACTIONNovember 2024December 2025Allow1331YesNo
18957190METHODS OF LIPID RECOVERY AND LEACHATE TREATMENTNovember 2024October 2025Allow1121NoNo
18867141DIALYSIS SYSTEM HAVING ENHANCED VALVE FEATURESNovember 2024April 2025Allow500NoNo
18944841Sand-manure liquid separation plant, a use of the plant, and a method of using the plantNovember 2024November 2025Allow1211NoNo
18936404METHOD AND SYSTEM FOR SUSTAINABLE BRINE TREATMENT AND HEAVY METAL PURIFICATION USING RECYCLED CARBON FIBERNovember 2024April 2025Allow610NoNo
18924424CONTINUOUS PURIFICATION DEVICEOctober 2024January 2026Allow1511NoNo
18910417SOLAR SEAWATER DESALINATION MEMBRANE, PREPARATION METHOD AND SEAWATER DESALINATION TREATMENT METHOD THEREOFOctober 2024January 2026Abandon1521NoNo
18893058PROCESS OF PURIFICATION OF PROTEINSeptember 2024January 2025Allow400NoNo
18849413FILTRATION MEMBRANE UNIT, HOLDER HOLDING SAME, FILTRATION SYSTEM INCLUDING FILTRATION MEMBRANE UNIT AND HOLDER, AND FILTRATION TREATMENT APPARATUS INCLUDING PLURALITY OF FILTRATION SYSTEMSSeptember 2024February 2025Allow500NoNo
18824560KITCHEN WASTE WASTEWATER TREATMENT EQUIPMENTSeptember 2024October 2024Allow200NoNo
18805922INTEGRATED RAPID TREATMENT SYSTEM FOR NUCLEAR MEDICAL RADIOACTIVE WASTEWATER AND APPLICATION METHOD THEREOFAugust 2024October 2024Allow200NoNo
18806298SYSTEMS AND METHODS FOR GENERATING LEADAugust 2024April 2025Allow811YesNo
18804147METHOD FOR RECYCLING COPPER-CONTAINING WASTEWATER FROM MICRO-ETCHINGAugust 2024November 2024Allow300NoNo
18799174ALIGNMENT NOTCH FOR AN ENDCAP OF A FILTER ELEMENTAugust 2024January 2026Allow1710NoNo
18797446SULFUR-MOLYBDENUM CLUSTER MODIFIED MOF MATERIAL AND PREPARATION METHOD AND APPLICATION THEREOFAugust 2024October 2024Allow200NoNo
18797358TREATING CIRCULATING CELL CLUSTERSAugust 2024August 2025Allow1221YesNo
18786770Large-flux Ultra-fine Grid System with Non-rotating Screen PlatesJuly 2024November 2024Allow310NoNo
18785323Treatment Method for Complete Harmless Treatment of Activated Sludge and Complete Resource Utilization of Activated Sludge's ProductsJuly 2024December 2024Allow410NoNo
18782638METHOD FOR FROTH-CONTROLLED FLOTATION OF ARGILLACEOUS LEPIDOLITE OREJuly 2024January 2025Allow610NoNo
18781703PROCESSES FOR RECOVERING LITHIUM VALUES FROM LITHIUM-CONTAINING BRINESJuly 2024November 2025Allow1631YesNo
18832109WATER TREATMENT APPARATUSJuly 2024October 2025Abandon1521YesNo
18730486MICROBUBBLES AMPLIFIERJuly 2024August 2025Allow1320NoNo
18773816Fluid Treatment Tank Having A Laser Welded Distributor PlateJuly 2024May 2025Allow1010NoNo
18769993DAIRY WASTEWATER TREATMENT SYSTEM AND METHODJuly 2024May 2025Allow1000NoNo
18768193WATER TREATMENT METHOD FOR ADSORBING METAL IONSJuly 2024September 2024Allow210NoNo
18767289METAL ION REMOVAL METHODJuly 2024September 2024Allow310NoNo
18764614PURIFICATION METHODS COMPRISING THE USE OF MEMBRANES OBTAINED FROM BIO-BASED SULFONE POLYMERSJuly 2024October 2025Abandon1501NoNo
18759868DEVICE FOR SCALE PREVENTION IN WATER SYSTEMS INCORPORATING MAGNETIC FIELD EXPOSURE AND METHODJune 2024November 2024Allow510NoNo
18758193MULTIPLE THREADED CONNECTOR FOR FILTERJune 2024May 2025Allow1110NoNo
18756677PRASEODYMIUM-DOPED UPCONVERSION PHOSPHORJune 2024September 2024Allow300NoNo
18755130PEROXYFORMIC ACID COMPOSITIONS FOR MEMBRANE FILTRATION CLEANING IN ENERGY SERVICESJune 2024May 2025Allow1010NoNo
18751125HIGH REJECTION SPIRAL WOUND ELEMENTS WITH PROTECTIVE FEATURESJune 2024March 2025Allow901YesNo
18747971CLASS OF NITROGEN-CONTAINING HETEROCYCLIC POLYMERS, A CLASS OF POLYMER MEMBRANES AND APPLICATIONS THEREOFJune 2024September 2024Allow310NoNo
18747386Outdoor Water PurifierJune 2024September 2024Allow300NoNo
18743123DEVICE AND METHOD FOR CONTROLLING DIFFUSION OF MPS CARRIED WITH ARGS IN WASTE WATER TREATMENT SYSTEMJune 2024September 2024Allow310YesNo
18736083SYSTEMS AND METHODS FOR THE PREPARATION OF PLANT DERIVED PRODUCTS USING OSMOSIS TECHNIQUESJune 2024December 2024Allow610NoNo
18731664METHOD FOR SEPARATION OF PARTICLES SUSPENDED IN A FLUIDJune 2024May 2025Allow1110NoNo
18732310FERRATE BASED WATER TREATMENTJune 2024March 2025Allow1001NoNo
18678363DEVICE AND SYSTEM FOR WATER DESALINIZATIONMay 2024December 2024Allow610NoNo
18676235METHOD FOR CONTROLLING HOLLOW FIBER NANOFILTRATION MEMBRANE SYSTEM WITH CONTROLLABLE POWER CONSUMPTIONMay 2024October 2024Allow410NoNo
18673916MODULAR PROCESSING SYSTEM AND METHOD FOR THE MODULAR CONSTRUCTION OF A PROCESSING SYSTEMMay 2024August 2025Allow1510NoNo
18674800SALINE WASTEWATER TREATMENT METHOD AND SYSTEMMay 2024October 2024Allow510NoNo
18666495SOLAR STILL WATER TREATMENT USING CARBON-BASED EFFERVESCENT TABLETS AND RELATED METHODSMay 2024December 2024Allow701NoNo
18662480APPARATUS AND METHODS FOR SEPARATING BLOOD COMPONENTSMay 2024August 2025Allow1610NoNo
18662697WATER DESALINATION AND ELECTRICAL POWER GENERATION UTILIZING GRAVITATIONAL FLOW AND GEOTHERMAL ENERGYMay 2024November 2024Allow610YesNo
18659294Filtration Films Having Dense Packing of Pores of Uniform Size and Distribution, and Tools and Methods for Their FormationMay 2024August 2025Abandon1501NoNo
18657561FILTER APPARATUS WITH VENTED COREMay 2024July 2025Allow1410YesNo
18653906COMPOSITIONS AND METHODS FOR PLASMAPHERESISMay 2024October 2024Allow501NoNo
18653903COMPOSITIONS AND METHODS FOR PLASMAPHERESISMay 2024February 2025Allow920YesNo
18651805SYSTEM AND PROCESS FOR REDUCING PFAS AND MICROPLASTICS IN BIOSOLIDS USING HYDRODYNAMIC CAVITATION AND FOAM FRACTIONATIONMay 2024January 2025Allow901NoNo
18652528HOLLOW FIBER MEMBRANE AND METHOD FOR CLOSING THE SAMEMay 2024February 2025Allow1011YesNo
18649157REVERSE OSMOSIS SYSTEMApril 2024February 2025Allow910NoNo
18648761METHOD FOR REMOVING FLUORINE-CONTAINING COMPOUND FROM WASTE WATERApril 2024April 2025Allow1110NoNo
18648343Membrane Fouling Early Warning Method and Device Based on Machine LearningApril 2024July 2024Allow300NoNo
18647347SYSTEM AND METHOD FOR PROCESSING INVASIVE PLANTS AND CREATING USEFUL PRODUCTSApril 2024September 2025Allow1721NoNo
18643122APPARATUS AND METHODS FOR SOLUTION PROCESSINGApril 2024September 2025Allow1721YesNo
18640022SYSTEMS AND METHODS OF BIOGENIC METHANE MITIGATIONApril 2024January 2025Allow911YesNo
18638505MIXED MATRIX MEMBRANES CONTAINING COVALENT TRIAZINE FRAMEWORKSApril 2024August 2024Allow401NoNo
18637521METHOD AND APPARATUS FOR SELF-CONTAINED FLUID CLEANING APPARATUSApril 2024June 2025Allow1410NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for art-unit 1777.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
344
Examiner Affirmed
203
(59.0%)
Examiner Reversed
141
(41.0%)
Reversal Percentile
82.2%
Higher than average

What This Means

With a 41.0% 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
882
Allowed After Appeal Filing
310
(35.1%)
Not Allowed After Appeal Filing
572
(64.9%)
Filing Benefit Percentile
65.5%
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, 35.1% 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 1777 - Prosecution Statistics Summary

Executive Summary

Art Unit 1777 is part of Group 1770 in Technology Center 1700. This art unit has examined 10,701 patent applications in our dataset, with an overall allowance rate of 62.1%. Applications typically reach final disposition in approximately 34 months.

Comparative Analysis

Art Unit 1777's allowance rate of 62.1% places it in the 17% percentile among all USPTO art units. This art unit has a significantly lower allowance rate than most art units at the USPTO.

Prosecution Patterns

Applications in Art Unit 1777 receive an average of 2.14 office actions before reaching final disposition (in the 69% percentile). The median prosecution time is 34 months (in the 33% 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 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.