USPTO Examiner ESSEX STEPHAN J - Art Unit 1727

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19196228WEARABLE AND REPLACEABLE POUCH OR SKIN FOR HOLDING A PORTABLE BATTERY PACKMay 2025August 2025Allow411NoNo
19034462NEGATIVE CURRENT COLLECTOR, PREPARATION METHOD OF THE SAME, SODIUM SECONDARY BATTERY, AND ELECTRICAL DEVICEJanuary 2025May 2025Allow300NoNo
19004350COMPOSITE DIAPHRAGMS FOR ZINC SECONDARY BATTERIES AND ZINC SECONDARY BATTERIESDecember 2024January 2026Allow1321NoNo
18955193AUTOMATIC MULTI-SURFACE JET PRINTING METHOD FOR POWER LITHIUM BATTERYNovember 2024June 2025Allow710NoNo
18894895WEARABLE AND REPLACEABLE POUCH OR SKIN FOR HOLDING A PORTABLE BATTERY PACKSeptember 2024March 2025Allow610NoNo
18777389ELECTROCHEMICAL CELLS WITH MULTIPLE SEPARATORS, AND METHODS OF PRODUCING THE SAMEJuly 2024June 2025Allow1121YesNo
18777403ELECTROCHEMICAL CELLS WITH MULTIPLE SEPARATORS, AND METHODS OF PRODUCING THE SAMEJuly 2024June 2025Allow1121NoNo
18777397ELECTROCHEMICAL CELLS WITH MULTIPLE SEPARATORS, AND METHODS OF PRODUCING THE SAMEJuly 2024June 2025Allow1121NoNo
18729864Layered Oxide Cathode Material and a Preparation Method Thereof, a Cathode Sheet, and a Sodium Ion BatteryJuly 2024November 2025Allow1600NoNo
18653972ELECTRODE PLATE, ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRIC DEVICEMay 2024August 2024Allow300YesNo
18440988POSITIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY COMPRISING THE SAMEFebruary 2024August 2025Allow1800NoNo
18514381LITHIUM ELECTRODENovember 2023August 2025Abandon2110NoNo
18498707PROTECTIVE INSERT FOR ELECTROCHEMICAL CELLOctober 2023March 2025Allow1611NoNo
18491279CELLULOSE-BASED SELF-STANDING FILMS FOR USE IN LI-ION BATTERIESOctober 2023January 2026Allow2700NoNo
18377385ZINC SECONDARY BATTERY AND SEPARATOR FOR ZINC SECONDARY BATTERYOctober 2023March 2025Allow1700YesNo
17914126SEPARATOR FOR SECONDARY BATTERY, MANUFACTURING METHOD THEREOF, METHOD FOR MANUFACTURING SECONDARY BATTERY COMPRISING THE SEPARATOR AND SECONDARY BATTERY MANUFACTURED BY THE METHODSeptember 2023July 2024Allow2210YesNo
18237635SECONDARY BATTERYAugust 2023September 2024Allow1300NoNo
18233042FUEL CELL AND MOBILE UNITAugust 2023March 2026Allow3100NoNo
18338530SODIUM METAL BATTERY AND ELECTROCHEMICAL APPARATUSJune 2023August 2025Allow2530NoNo
18314158POSITIVE CURRENT COLLECTOR, SECONDARY BATTERY, AND ELECTRICAL DEVICEMay 2023August 2023Allow300NoNo
18136131BIPOLAR STRUCTURES FOR USE WITH ELECTROCHEMICAL DEVICES, AND ASSOCIATED SYSTEMS AND METHODSApril 2023August 2025Abandon2801NoNo
18193408METHOD OF CONTINUOUSLY REGENERATING WASTE SEPARATOR INCLUDING INORGANIC PARTICLESMarch 2023March 2024Allow1211YesNo
18170586ALL SOLID STATE BATTERYFebruary 2023May 2025Allow2701NoNo
18160923INTERCONNECTING CURRENT COLLECTORS COMPRISING POLYMER BASESJanuary 2023July 2023Allow601NoNo
18075990HARDLY GRAPHITIZABLE CARBONACEOUS MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES FULLY CHARGED TO BE USED, METHOD FOR PRODUCING SAME, NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY FULLY CHARGED TO BE USEDDecember 2022March 2025Allow2830NoNo
18055623ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND METHOD AND APPARATUS FOR MANUFACTURING ELECTRODE ASSEMBLYNovember 2022July 2023Allow810NoNo
17980073SECONDARY BATTERYNovember 2022March 2023Allow500YesNo
17923145SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAMENovember 2022September 2025Allow3500NoNo
17921285SEPARATOR FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAMEOctober 2022October 2025Allow3610NoNo
17916811RECHARGEABLE ELECTRICAL STORAGE DEVICESOctober 2022October 2023Allow1210NoNo
17914573Electrode Assembly Comprising Anode Sheet and Anode Having Improved Stacking Characteristics of Electrode, and Method of Manufacturing the SameSeptember 2022October 2024Allow2412YesNo
17939866THREE-DIMENSIONAL FOLDED BATTERY UNIT AND METHODS FOR MANUFACTURING THE SAMESeptember 2022July 2023Allow1010NoNo
17888613CLAD CURRENT COLLECTORS INCLUDING THERMAL INTERFACE LAYER FOR BIPOLAR SOLID-STATE BATTERIESAugust 2022January 2026Allow4111NoNo
17880122LITHIUM ELECTRODEAugust 2022August 2023Allow1210NoNo
17813062Modular Lithium-Ion Battery System for Fork LiftsJuly 2022September 2025Allow3820NoNo
17862036MICROMACHINED ELECTROLYTE SHEETJuly 2022December 2024Allow3010NoNo
17833485PASSIVE ELECTRIC GENERATOR SYSTEMJune 2022December 2022Allow611NoNo
17664633DRY PROCESS ELECTRICALLY CONDUCTIVE COMPOSITE FORMATIONMay 2022October 2023Abandon1610NoNo
17733658ELECTROCHEMICAL CELLS WITH MULTIPLE SEPARATORS, AND METHODS OF PRODUCING THE SAMEApril 2022June 2025Allow3811NoNo
17720451METHOD OF MANUFACTURING PROTON SELECTIVE MEMBRANES BASED ON TWO DIMENSIONAL MATERIALSApril 2022October 2023Allow1820NoNo
17659142RECHARGEABLE BATTERIES AND METHODS OF MAKING SAMEApril 2022March 2025Abandon3510NoNo
17716776SEPARATOR FOR ELECTROCHEMICAL ELEMENTApril 2022August 2023Allow1720NoNo
17693370Thin-film all-organic electrochemical deviceMarch 2022November 2024Allow3201YesNo
17652086LOW RESISTANCE SEPARATOR DESIGN IN BATTERY CELLSFebruary 2022November 2025Allow4421YesNo
17675523CERIA COATINGS AND STRUCTURES FOR ZINC-BASED BATTERY SEPARATORSFebruary 2022May 2022Allow310NoNo
17548848METAL-POLYMER HYBRID CURRENT COLLECTOR FOR AN ELECTRODE OF A BATTERY AND METHOD OF MANUFACTUREDecember 2021June 2025Allow4221YesNo
17457531IONIC LIQUID SOFTENED POLYMER ELECTROLYTE FOR ZINC ION BATTERIESDecember 2021December 2023Allow2410NoNo
17300843Non-aqueous ammonia electrolytes for lithium anode based primary and reserve batteriesNovember 2021June 2024Abandon3130NoNo
17528944RECHARGEABLE BATTERY CELLNovember 2021November 2023Allow2421NoNo
17528719ALCOHOL-BASED ELECTROLYTES FOR HIGHLY REVERSIBLE ZN METAL BATTERIESNovember 2021January 2026Allow5050YesNo
17527690RECHARGEABLE BATTERY CELLNovember 2021November 2023Allow2421NoNo
17479881Rechargeable Alkaline Metal And Alkaline Earth Electrodes Having Controlled Dendritic Growth And Methods For Making And Using SameSeptember 2021December 2025Abandon5121NoNo
17407109THREE-DIMENSIONAL FOLDED BATTERY UNIT AND METHODS FOR MANUFACTURING THE SAMEAugust 2021June 2022Allow901YesNo
17405396WATER SOFTENING INTERCALATION MATERIALSAugust 2021April 2025Allow4421YesNo
17391426ZINC SECONDARY BATTERY AND SEPARATOR FOR ZINC SECONDARY BATTERYAugust 2021July 2023Allow2320YesNo
17372711SYSTEMS AND METHODS FOR POTASSIUM ENHANCING SILICON-CONTAINING ANODES FOR IMPROVED CYCLABILITYJuly 2021December 2022Allow1700NoNo
17370160METHOD OF MANUFACTURING SEPARATORJuly 2021March 2024Allow3320NoNo
17368237MODULAR LITHIUM-ION BATTERY SYSTEM FOR FORK LIFTSJuly 2021June 2025Allow4821YesNo
17350717Alkaline Battery Assembled In A Discharged State And A Method Of Producing Battery Electrode MaterialsJune 2021September 2024Abandon3911NoNo
17340115RECHARGEABLE TRANSITION METAL BATTERYJune 2021September 2023Allow2820NoNo
17335757HIGH CAPACITY POLYMER CATHODE AND HIGH ENERGY DENSITY RECHARGEABLE CELL COMPRISING THE CATHODEJune 2021April 2023Abandon2210NoNo
17327695SYSTEM AND METHOD FOR ELECTROCHEMICAL ENERGY CONVERSION AND STORAGEMay 2021November 2025Abandon5301NoNo
17291018FOIL FOR SECONDARY BATTERY NEGATIVE ELECTRODE COLLECTORMay 2021March 2022Allow1110NoNo
17246861LITHIUM ELECTROCHEMICAL CELL ACTIVATED WITH AN ELECTROLYTE CONTAINING DBC, LiBOB AND FEC ADDITIVESMay 2021April 2023Allow2330NoNo
17246431SYSTEMS AND METHODS FOR BATTERY THERMAL MANAGEMENT UTILIZING A VAPOR CHAMBERApril 2021February 2023Allow2110NoNo
17243841METHOD AND DEVICE FOR PRODUCING ELECTRODE BODYApril 2021August 2021Allow300NoNo
17244196METHOD AND APPARATUS FOR FABRICATING AN ELECTRODE FOR A BATTERYApril 2021December 2023Abandon3120NoNo
17243073PLANAR SOLID ELECTROLYTE OXYGEN SEPARATORApril 2021May 2025Allow4821NoNo
17239982LITHIUM ION SECONDARY BATTERY AND METHOD OF PRODUCING THE SAMEApril 2021September 2022Allow1730YesNo
17288417IMPROVED ANODE MATERIAL AND ANODE FOR A RECHARGEABLE BATTERY, A METHOD OF PRODUCTION THEREOF AND AN ELECTROCHEMICAL CELL MADE THEREFROMApril 2021August 2024Allow4021YesNo
17233636ALL SOLID FLUORIDE ION BATTERYApril 2021January 2023Allow2110NoNo
17230715CURRENT COLLECTOR, ELECTRODE PLATE, ELECTROCHEMICAL APPARATUS, AND ELECTRONIC APPARATUSApril 2021February 2025Abandon4630NoNo
17229666THERMAL AND ELECTRICAL MANAGEMENT OF BATTERY PACKSApril 2021May 2023Allow2510NoNo
17300205High voltage cathode materials for non-aquenous ammonia basedApril 2021June 2024Abandon3830NoNo
17223152SECONDARY ELECTRODE INCLUDING STYRENE-BUTADIENE RUBBERApril 2021October 2021Allow610YesNo
17206580FUEL CELL SYSTEM AND METHOD FOR CONTROLLING FUEL CELLMarch 2021September 2025Abandon5421YesNo
17200975Lithium Electrochemical Cell Activated With An Electrolyte Containing LiBOB And FEC AdditivesMarch 2021April 2023Allow2530YesNo
17274376Ceramic Nanowire Battery SeparatorsMarch 2021October 2023Allow3110YesNo
17273465SECONDARY BATTERY POSITIVE ELECTRODE AND SECONDARY BATTERYMarch 2021May 2023Allow2700NoNo
17189765LDH SEPARATOR AND ZINC SECONDARY BATTERYMarch 2021August 2021Allow610YesNo
17187217RAPID SULFUR MELT DIFFUSION INTO CARBON HOST FOR MAKING ELECTRODESFebruary 2021November 2024Allow4430NoNo
17271348NONAQUEOUS ELECTROLYTE SECONDARY BATTERYFebruary 2021November 2023Allow3310NoNo
17179354COMPOSITE FOR POSITIVE ELECTRODE ACTIVE MATERIAL OF SECONDARY BATTERY, SECONDARY BATTERY INCLUDING SAME, AND METHOD FOR PREPARING SAMEFebruary 2021August 2023Allow2930NoNo
17163036PASSIVATION MATERIALS ON ALKALINE EARTH METALSJanuary 2021March 2023Allow2621NoNo
17130996HYBRID BATTERY SYSTEM WITH MULTIPLE DISCHARGE VOLTAGE PLATEAUS AND GREATER CHARGE CAPACITY OF METAL IN THE NEGATIVE ELECTRODEDecember 2020May 2024Allow4111NoNo
17127622SECONDARY BATTERYDecember 2020November 2022Allow2310YesNo
17118527ALL-SOLID SECONDARY BATTERY AND METHOD OF PREPARING THE SAMEDecember 2020June 2025Allow5421NoNo
17112167CURRENT COLLECTOR FOR SECONDARY BATTERYDecember 2020January 2023Abandon2520NoNo
17106727FOLDING TYPE LITHIUM AIR BATTERY AND METHOD FOR MANUFACTURING SAMENovember 2020June 2024Allow4231NoNo
17104306Sodium Electrochemical Interfaces with NaSICON-Type CeramicsNovember 2020September 2022Allow2110YesNo
17102967Solid Electrolyte and Preparing Method ThereofNovember 2020December 2023Abandon3611NoNo
17099902AQUEOUS BATTERYNovember 2020July 2022Allow2010NoNo
17097777LITHIUM-METAL BATTERIES HAVING IMPROVED DIMENSIONAL STABILITY AND METHODS OF MANUFACTURENovember 2020June 2023Allow3130YesNo
17098216BIPOLAR STRUCTURES FOR USE WITH ELECTROCHEMICAL DEVICES, AND ASSOCIATED SYSTEMS AND METHODSNovember 2020January 2023Allow2640YesNo
17096679LITHIUM BATTERY STRUCTURENovember 2020February 2024Allow4021NoNo
17054166SLURRY FOR NON-AQUEOUS SECONDARY BATTERY, SEPARATOR FOR NON-AQUEOUS SECONDARY BATTERY, ELECTRODE FOR NON-AQUEOUS SECONDARY BATTERY, LAMINATE FOR NON-AQUEOUS SECONDARY BATTERY, AND NON-AQUEOUS SECONDARY BATTERYNovember 2020March 2025Allow5340NoNo
17092658ZINC SECONDARY BATTERYNovember 2020January 2023Abandon2620YesNo
17083207NEGATIVE-ELECTRODE COMPOSITION FOR ALKALINE SECONDARY BATTERIES, AND ALKALINE SECONDARY BATTERY NEGATIVE ELECTRODEOctober 2020February 2023Allow2720YesNo
17077330MICROMACHINED ELECTROLYTE SHEETOctober 2020April 2022Allow1700YesNo
17048717CELLULOSE-BASED SELF-STANDING FILMS FOR USE IN LI-ION BATTERIESOctober 2020June 2023Allow3210NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner ESSEX, STEPHAN J.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
17
Examiner Affirmed
15
(88.2%)
Examiner Reversed
2
(11.8%)
Reversal Percentile
24.4%
Lower than average

What This Means

With a 11.8% reversal rate, the PTAB affirms the examiner's rejections in the vast majority of cases. This reversal rate is in the bottom 25% across the USPTO, indicating that appeals face significant challenges here.

Strategic Value of Filing an Appeal

Total Appeal Filings
42
Allowed After Appeal Filing
4
(9.5%)
Not Allowed After Appeal Filing
38
(90.5%)
Filing Benefit Percentile
13.2%
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, 9.5% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is in the bottom 25% across the USPTO, indicating that filing appeals is less effective here than in most other areas.

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 ESSEX, STEPHAN J - Prosecution Strategy Guide

Executive Summary

Examiner ESSEX, STEPHAN J works in Art Unit 1727 and has examined 667 patent applications in our dataset. With an allowance rate of 65.2%, this examiner has a below-average tendency to allow applications. Applications typically reach final disposition in approximately 41 months.

Allowance Patterns

Examiner ESSEX, STEPHAN J's allowance rate of 65.2% places them in the 26% percentile among all USPTO examiners. This examiner has a below-average tendency to allow applications.

Office Action Patterns

On average, applications examined by ESSEX, STEPHAN J receive 2.56 office actions before reaching final disposition. This places the examiner in the 75% 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 ESSEX, STEPHAN J is 41 months. This places the examiner in the 20% percentile for prosecution speed. Applications take longer to reach final disposition with this examiner compared to most others.

Interview Effectiveness

Conducting an examiner interview provides a -10.2% benefit to allowance rate for applications examined by ESSEX, STEPHAN J. This interview benefit is in the 3% percentile among all examiners. Note: Interviews show limited statistical benefit with this examiner compared to others, though they may still be valuable for clarifying issues.

Request for Continued Examination (RCE) Effectiveness

When applicants file an RCE with this examiner, 22.6% of applications are subsequently allowed. This success rate is in the 29% percentile among all examiners. Strategic Insight: RCEs show below-average effectiveness with this examiner. Carefully evaluate whether an RCE or continuation is the better strategy.

After-Final Amendment Practice

This examiner enters after-final amendments leading to allowance in 17.7% of cases where such amendments are filed. This entry rate is in the 20% percentile among all examiners. Strategic Recommendation: This examiner rarely enters after-final amendments compared to other examiners. You should generally plan to file an RCE or appeal rather than relying on after-final amendment entry. Per MPEP § 714.12, primary examiners have discretion in entering after-final amendments, and this examiner exercises that discretion conservatively.

Pre-Appeal Conference Effectiveness

When applicants request a pre-appeal conference (PAC) with this examiner, 25.0% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 29% 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 50.0% of appeals filed. This is in the 15% percentile among all examiners. Of these withdrawals, 52.9% 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, 50.0% are granted (fully or in part). This grant rate is in the 46% percentile among all examiners. Strategic Note: Petitions show below-average success regarding this examiner's actions. Ensure you have a strong procedural basis before filing.

Examiner Cooperation and Flexibility

Examiner's Amendments: This examiner makes examiner's amendments in 1.3% of allowed cases (in the 70% percentile). This examiner makes examiner's amendments more often than average to place applications in condition for allowance (MPEP § 1302.04).

Quayle Actions: This examiner issues Ex Parte Quayle actions in 2.8% of allowed cases (in the 72% 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:

  • Plan for RCE after final rejection: This examiner rarely enters after-final amendments. Budget for an RCE in your prosecution strategy if you receive a final rejection.
  • Plan for extended prosecution: Applications take longer than average with this examiner. Factor this into your continuation strategy and client communications.

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.