USPTO Examiner MENON KRISHNAN S - Art Unit 1777

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
19304453CLEANING DEVICEAugust 2025October 2025Allow200NoNo
19211681THERMOELECTRIC DISTILLATION APPARATUSMay 2025July 2025Allow210NoNo
19184946DISTILLATION AND HEAT EXCHANGE APPARATUSApril 2025July 2025Allow210NoNo
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
18797358TREATING CIRCULATING CELL CLUSTERSAugust 2024August 2025Allow1221YesNo
18786770Large-flux Ultra-fine Grid System with Non-rotating Screen PlatesJuly 2024November 2024Allow310NoNo
18747971CLASS OF NITROGEN-CONTAINING HETEROCYCLIC POLYMERS, A CLASS OF POLYMER MEMBRANES AND APPLICATIONS THEREOFJune 2024September 2024Allow310NoNo
18659294Filtration Films Having Dense Packing of Pores of Uniform Size and Distribution, and Tools and Methods for Their FormationMay 2024August 2025Abandon1501NoNo
18652528HOLLOW FIBER MEMBRANE AND METHOD FOR CLOSING THE SAMEMay 2024February 2025Allow1011YesNo
18643122APPARATUS AND METHODS FOR SOLUTION PROCESSINGApril 2024September 2025Allow1721YesNo
18638505MIXED MATRIX MEMBRANES CONTAINING COVALENT TRIAZINE FRAMEWORKSApril 2024August 2024Allow401NoNo
18588284Extracorporeal Device and Method for Removal of Secondary MembraneFebruary 2024August 2025Allow1720NoNo
18585570TiO2-Surface Modified Bio-AdsorbentFebruary 2024June 2024Allow400NoNo
18581246SYNTHESIS OF NON-IONIC HYDROGELS FOR NON-IONIC POLLUTANT REMOVALFebruary 2024July 2024Allow511YesNo
18430460AFFINITY MEMBRANE AND METHOD OF PREPARATIONFebruary 2024June 2025Allow1610NoNo
18414850DEGASSING UNITJanuary 2024March 2025Allow1400NoNo
18414308NANO BUBBLE AND HYDROXYL RADICAL GENERATOR (NBHRG) AND PROCESSING SYSTEM TO DECONTAMINATE WATER WITHOUT CHEMICALS USING NBHRGJanuary 2024September 2025Abandon2010NoNo
18408133ELECTRODIALYSIS STACKJanuary 2024July 2025Allow1820NoNo
18408372MICROPOROUS POLYOLEFIN MEMBRANES FROM BESPOKE SOLVENTSJanuary 2024August 2024Allow811YesNo
18406169INTEGRATED WATER SUPPLY AND POWER SYSTEMJanuary 2024December 2025Allow2300NoNo
18396765Filtration System for Preparation of Fluids for Medical ApplicationsDecember 2023April 2025Allow1501NoNo
18390093SUPPORTED MEMBRANES BY THERMAL AND UV INITITATED MASS POLYMERIZATIONDecember 2023December 2024Allow1100NoNo
18571273WATER PURIFIERDecember 2023February 2026Allow2600NoNo
18536637Fluid Preparation and Treatment Devices Methods and SystemsDecember 2023May 2025Allow1711YesNo
18535389Device, System And Method For The Detection And Screening of Plastic MicroparticlesDecember 2023April 2025Allow1620YesNo
18530997FILTERING DEVICE, PURIFICATION DEVICE, AND METHOD FOR MANUFACTURING CHEMICAL LIQUIDDecember 2023March 2026Allow2731YesNo
18525085AIR FILTER MEDIUM, PLEATED FILTER MEDIUM, AIR FILTER UNIT, MASK FILTER MEDIUM, AND METHOD FOR REGENERATING AIR FILTER MEDIUMNovember 2023September 2025Allow2241YesNo
18564074OPTICAL SENSOR FOR DETERMINING A DIALYSIS DOSENovember 2023September 2024Allow910NoNo
18564014DRINKING WATER DISPENSER WITH ULTRAVIOLET DISINFECTION DEVICENovember 2023January 2026Allow2600NoNo
18500688BACKFLOW-PREVENTING FILTER MODULENovember 2023January 2026Allow2600NoNo
18490621MICROPOROUS POLYOLEFIN MEMBRANES FROM BESPOKE SOLVENTSOctober 2023January 2026Allow2761YesNo
18380211PREPARATION METHOD AND A DEVICE FOR A SEAWATER DESALINATION-SEAWATER EXTRACTION URANIUM MEMBRANE LININGOctober 2023January 2024Allow300NoNo
18481313METHODS FOR REDUCING IMPURITIES IN SILK FIBROIN PREPARATIONSOctober 2023March 2024Allow620YesNo
18553678METHOD AND SYSTEM FOR PRE-TREATING HIGH STRENGTH WASTEWATEROctober 2023March 2026Allow3010NoNo
18368617SOLUTIONS FOR CONTINUOUS INFUSION OF A DRUG ADMINISTERED VIA DIALYSIS AND DOSING ALGORITHM THEREFORSeptember 2023August 2025Abandon2310NoNo
18367969COMPOSITE NANOPOROUS METAL MEMBRANESeptember 2023January 2025Allow1600NoNo
18239772METHOD OF REMOVING PROTEIN-BOUND SUBSTANCES BY ELECTRICALLY CONDUCTIVE POLYMERAugust 2023May 2024Allow800NoNo
18239346METHOD FOR MANUFACTURING OXYGENATORAugust 2023October 2025Allow2600NoNo
18238802DIETHYLAMINO ETHYL POLYMERS AND METHODS OF USEAugust 2023March 2026Allow3111NoNo
18277882ROLLER FOR CHAIN AND SCRAPER ASSEMBLYAugust 2023October 2025Allow2610YesNo
18276055PREPARATION METHOD FOR HIGH-MOISTURE-PERMEABILITY FLUORINE-CONTAINING SUPER-OLEOPHOBIC MICROPOROUS MEMBRANEAugust 2023December 2025Allow2910NoNo
18229556FILTER APPARATUS FOR SEMICONDUCTOR DEVICE FABRICATION PROCESSAugust 2023March 2025Allow1911NoNo
18260855NON-DESTRUCTIVE METHOD FOR DETERMINING THE RESIDUAL HOLDING CAPACITY OF AN ADSORBENT FILTER AND ASSOCIATED TEST BENCHJuly 2023January 2024Allow601NoNo
18260436METHOD FOR IMPROVING THE AIRTIGHTNESS OF BUILDINGS USING A BIOPOLYMER-BASED MEMBRANEJuly 2023February 2026Allow3220NoNo
18217768WATER TREATMENT SYSTEM AND METHOD FOR USE WITH AN ENVIRONMENTAL CHAMBER OR AN INCUBATORJuly 2023January 2026Allow3110NoNo
18209578LOW-PRESSURE HIGH-FLUX HOLLOW FIBER NANOFILTRATION (NF) MEMBRANE, AND PREPARATION METHOD AND USE THEREOFJune 2023November 2023Allow510YesNo
18257230REVERSE OSMOSIS COMPOSITE MEMBRANE WITH AN ULTRATHIN DESALTING LAYER AND PREPARATION METHOD THEREOFJune 2023September 2025Allow2700NoNo
18333663TRIAMINE-FUNCTIONALIZED MCM-41-BASED FILTRATION MEMBRANEJune 2023October 2025Allow2800NoNo
18332593ULTRATHIN MEMBRANES FOR NANOSCALE PORES AND CHANNELSJune 2023January 2026Allow3101NoNo
18255857WASTEWATER TREATMENT SYSTEMS AND METHODSJune 2023December 2025Allow3110NoNo
18039279POLYAMIDE COMPOSITE REVERSE OSMOSIS MEMBRANE AND PREPARATION METHOD THEREOFMay 2023January 2026Allow3211NoNo
18254054PILLAR STRUCTURESMay 2023November 2025Allow3010NoNo
18321291PRESERVING SORBENT DEVICES IN DIALYSIS SYSTEMSMay 2023January 2025Allow2010NoNo
18037830Filtration Systems, Components and MethodsMay 2023February 2026Allow3320NoNo
18195722POROUS MEMBRANE INCLUDING PERFLUOROALKOXY ALKANE (PFA)-BASED MELT-EXTRUDED FILM AND HAVING PORES CONTROLLED BY BIAXIAL STRETCHING, AND MANUFACTURING METHOD THEREFORMay 2023November 2025Allow3011NoNo
18140274CARBON NANOMEMBRANES ON POROUS MATERIALSApril 2023May 2025Abandon2510NoNo
18307498HYBRID MEMBRANE FOR GAS SEPARATIONApril 2023March 2024Allow1101YesNo
18297534NANOPOROUS SELECTIVE SOL-GEL CERAMIC MEMBRANESApril 2023September 2024Allow1800NoNo
18245558ASSEMBLY COMPRISING A CENTER-FLUID DISTRIBUTOR AND A MULTI-FIBER SPINNERETMarch 2023November 2025Allow3210NoNo
18183255MULTILAYERED WIRE MESH-SUPPORTED MEMBRANES FOR SEPARATION APPLICATIONSMarch 2023April 2024Allow1311NoNo
18025788WEARABLE HEMOFILTRATION ARTIFICIAL KIDNEYMarch 2023September 2025Allow3101NoNo
18179791POLYPYRROLE CERAMIC-POLYMERIC POROUS MEMBRANE FOR SEPARATING AN OIL AND WATER MIXTUREMarch 2023June 2025Allow2710NoNo
18117445PREPARATION AND APPLICATION OF GRADIENT LONG-EFFECTIVE CATALYTIC MEMBRANE WITH HIGH-STRENGTH AND ANTI-DEPOSITION PROPERTYMarch 2023July 2023Allow400NoNo
18024423Ultrasound Device for Destruction of Organic ChemicalsMarch 2023October 2025Allow3211NoNo
18116092SYSTEMS, DEVICES, AND METHODS FOR EXTRACORPOREAL REMOVAL OF CARBON DIOXIDEMarch 2023September 2024Allow1810NoNo
18174926SYSTEMS AND METHODS FOR INDUCING PLUG FLOW DURING FLUID SEPARATION USING AIRFebruary 2023August 2025Allow3010NoNo
18110970Sand TrapFebruary 2023May 2025Allow2700NoNo
18169913GRAPHENE MEMBRANES AND METHODS FOR MAKING GRAPHENE MEMBRANESFebruary 2023January 2025Allow2310NoNo
17776965METHODS FOR TREATING POROUS MEMBRANESFebruary 2023July 2025Allow3800NoNo
18166520FILTRATION UNITS AND ASSEMBLY, AND METHODS OF MAKING AND USING SAMEFebruary 2023January 2026Allow3511NoNo
18165834Over Flow Box FilterFebruary 2023January 2026Abandon3510NoNo
18020230SEPARATION OF ALCOHOL USING A MEMBRANEFebruary 2023February 2026Allow3620NoNo
18007014METHOD FOR THE BONDING, TRANSPORT, REACTION ACTIVATION, CONVERSION, STORAGE AND RELEASE OF WATER-SOLUBLE GASESJanuary 2023January 2026Allow3620NoNo
18097485THIN WALL POLYETHER BLOCK AMIDE MEMBRANE TUBING AND MODULEJanuary 2023April 2025Allow2710NoNo
18016003SPIRAL WOUND MULTI-EFFECT MEMBRANE DISTILLATION MODULEJanuary 2023August 2025Allow3100NoNo
18152331IN-LINE HEATING OF DIALYSIS FLUIDSJanuary 2023April 2024Allow1600NoNo
18151597Adjustment Of Target Interface Position In A Centrifuge Based On Lipid ConcentrationJanuary 2023March 2026Allow3821NoNo
18093650STRUCTURE FOR APPLIANCE WATER FILTERJanuary 2023August 2025Allow3110NoNo
18013332Composite Hollow Fiber Membrane Module and Method for Producing SameDecember 2022December 2025Abandon3601NoNo
18085724Hollow Fiber Membrane Module for Direct Contact Membrane Distillation-Based DesalinationDecember 2022August 2024Allow2010NoNo
18011692EVALUATION METHOD FOR PROTEIN-CONTAINING SOLUTIONDecember 2022June 2025Allow3000NoNo
18068895METHOD AND APPARATUS FOR ELECTROCHEMICAL DEWATERING OF SUSPENSIONS OF CELLULOSIC NANOMATERIALSDecember 2022July 2024Allow1811NoNo
18083155RIGID SELF-SUPPORTING MXene SEPARATION MEMBRANE AND PREPARATION METHOD AND USE THEREOFDecember 2022June 2025Allow3000NoNo
18075321HEMODIALYSIS SYSTEM RESERVOIR LEVEL SENSORDecember 2022September 2025Allow3410NoNo
18071613Design of Fluid Manifolds in Electrodialysis DevicesNovember 2022April 2024Allow1710YesNo
17994686PROCESS FOR OBTAINING POLYAMIDE MEMBRANE WITH NANOSTRUCTURED COATING, MEMBRANES AND USENovember 2022July 2025Allow3101NoNo
18058747SWIMMING POOL SEWAGE SUCTION MACHINE AND CONTROL METHOD THEREOFNovember 2022April 2025Allow2900NoNo
17927541OIL AND WATER SEPARATION MEMBRANENovember 2022November 2025Abandon3601NoNo
17993289METHODS AND SYSTEMS FOR THE SEPARATION OF METAL IONS FROM AN AQUEOUS FEEDNovember 2022December 2025Abandon3710NoNo
17926638HOLLOW FIBER MEMBRANE FOR SEPARATING BLOOD PLASMA FROM BLOODNovember 2022December 2025Allow3621YesNo
17990059LIGHT-GUIDING FLOW CELL TECHNOLOGIESNovember 2022January 2026Allow3821YesNo
18055602EFFICIENT AND STABLE MAGNETIC NANOFIBER MEMBRANE AND PREPARATION METHOD AND USE THEREOFNovember 2022June 2025Allow3101NoNo
18054609METHOD OF PRODUCING HOLLOW FIBER MEMBRANENovember 2022March 2025Abandon2820NoNo
17924297A SEMI-CRYSTALLINE POLYMER MEMBRANENovember 2022November 2025Abandon3601NoNo
17924298CERAMIC MEMBRANE TECHNOLOGY FOR MOLECULE-RANGE SEPARATIONNovember 2022August 2025Allow3411NoNo
17921812FILTER DEVICE AND METHOD FOR ASSEMBLING AND DISASSEMBLING SUCH A FILTER DEVICEOctober 2022June 2025Allow3210NoNo
18050011PROCESS FOR PREPARING EXTRACELLULAR VESICLESOctober 2022July 2025Allow3230NoNo
17920792MULTILAYER POROUS MEMBRANE WITH INCOMPATIBLE RESINSOctober 2022March 2026Allow4140NoNo
17961802THERMOELECTRIC WATER GAP MEMBRANE DISTILLATION SYSTEM AND PROCESSOctober 2022March 2025Allow2910NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner MENON, KRISHNAN S.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
80
Examiner Affirmed
54
(67.5%)
Examiner Reversed
26
(32.5%)
Reversal Percentile
48.8%
Lower than average

What This Means

With a 32.5% reversal rate, the PTAB reverses the examiner's rejections in a meaningful percentage 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
169
Allowed After Appeal Filing
54
(32.0%)
Not Allowed After Appeal Filing
115
(68.0%)
Filing Benefit Percentile
49.1%
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, 32.0% 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.

Examiner MENON, KRISHNAN S - Prosecution Strategy Guide

Executive Summary

Examiner MENON, KRISHNAN S works in Art Unit 1777 and has examined 1,338 patent applications in our dataset. With an allowance rate of 63.2%, this examiner allows applications at a lower rate than most examiners at the USPTO. Applications typically reach final disposition in approximately 34 months.

Allowance Patterns

Examiner MENON, KRISHNAN S's allowance rate of 63.2% places them in the 23% percentile among all USPTO examiners. This examiner is less likely to allow applications than most examiners at the USPTO.

Office Action Patterns

On average, applications examined by MENON, KRISHNAN S receive 2.22 office actions before reaching final disposition. This places the examiner in the 61% percentile for office actions issued. This examiner issues a slightly above-average number of office actions.

Prosecution Timeline

The median time to disposition (half-life) for applications examined by MENON, KRISHNAN S is 34 months. This places the examiner in the 42% percentile for prosecution speed. Prosecution timelines are slightly slower than average with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +5.8% benefit to allowance rate for applications examined by MENON, KRISHNAN S. This interview benefit is in the 32% percentile among all examiners. Recommendation: Interviews provide a below-average benefit with this examiner.

Request for Continued Examination (RCE) Effectiveness

When applicants file an RCE with this examiner, 18.9% of applications are subsequently allowed. This success rate is in the 18% percentile among all examiners. Strategic Insight: RCEs show lower effectiveness with this examiner compared to others. Consider whether a continuation application might be more strategic, especially if you need to add new matter or significantly broaden claims.

After-Final Amendment Practice

This examiner enters after-final amendments leading to allowance in 32.2% of cases where such amendments are filed. This entry rate is in the 47% percentile among all examiners. Strategic Recommendation: This examiner shows below-average receptiveness to after-final amendments. You may need to file an RCE or appeal rather than relying on after-final amendment entry.

Pre-Appeal Conference Effectiveness

When applicants request a pre-appeal conference (PAC) with this examiner, 21.8% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 27% percentile among all examiners. Note: Pre-appeal conferences show below-average success with this examiner. Consider whether your arguments are strong enough to warrant a PAC request.

Appeal Withdrawal and Reconsideration

This examiner withdraws rejections or reopens prosecution in 53.8% of appeals filed. This is in the 24% percentile among all examiners. Of these withdrawals, 35.5% occur early in the appeal process (after Notice of Appeal but before Appeal Brief). Strategic Insight: This examiner rarely withdraws rejections during the appeal process compared to other examiners. If you file an appeal, be prepared to fully prosecute it to a PTAB decision. Per MPEP § 1207, the examiner will prepare an Examiner's Answer maintaining the rejections.

Petition Practice

When applicants file petitions regarding this examiner's actions, 55.0% are granted (fully or in part). This grant rate is in the 56% percentile among all examiners. Strategic Note: Petitions show above-average success regarding this examiner's actions. Petitionable matters include restriction requirements (MPEP § 1002.02(c)(2)) and various procedural issues.

Examiner Cooperation and Flexibility

Examiner's Amendments: This examiner makes examiner's amendments in 2.5% of allowed cases (in the 77% percentile). Per MPEP § 1302.04, examiner's amendments are used to place applications in condition for allowance when only minor changes are needed. This examiner frequently uses this tool compared to other examiners, indicating a cooperative approach to getting applications allowed. Strategic Insight: If you are close to allowance but minor claim amendments are needed, this examiner may be willing to make an examiner's amendment rather than requiring another round of prosecution.

Quayle Actions: This examiner issues Ex Parte Quayle actions in 0.2% of allowed cases (in the 52% percentile). This examiner issues Quayle actions more often than average when claims are allowable but formal matters remain (MPEP § 714.14).

Prosecution Strategy Recommendations

Based on the statistical analysis of this examiner's prosecution patterns, here are tailored strategic recommendations:

  • Prepare for rigorous examination: With a below-average allowance rate, ensure your application has strong written description and enablement support. Consider filing a continuation if you need to add new matter.
  • Examiner cooperation: This examiner frequently makes examiner's amendments to place applications in condition for allowance. If you are close to allowance, the examiner may help finalize the claims.

Relevant MPEP Sections for Prosecution Strategy

  • MPEP § 713.10: Examiner interviews - available before Notice of Allowance or transfer to PTAB
  • MPEP § 714.12: After-final amendments - may be entered "under justifiable circumstances"
  • MPEP § 1002.02(c): Petitionable matters to Technology Center Director
  • MPEP § 1004: Actions requiring primary examiner signature (allowances, final rejections, examiner's answers)
  • MPEP § 1207.01: Appeal conferences - mandatory for all appeals
  • MPEP § 1214.07: Reopening prosecution after appeal

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.