USPTO Examiner QIAN SHIZHI - Art Unit 1795

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
18950993ULTRASENSITIVE AND SELECTIVE SENSORS FOR GLUCOSE DETECTION BASED ON THIOL-FUNCTIONALIZED HETEROGENOUS GOLD/GRAPHENE/COPPER FILMNovember 2024August 2025Abandon910NoNo
18719006DOPED COLLOIDAL METAL OXIDE QUANTUM WIRE AND PREPARATION METHOD THEREOF, GAS SENSOR, GAS SENSOR ARRAY AND USE THEREOFJune 2024December 2025Allow1820NoNo
18668141SYSTEMS AND METHODS FOR AN ENHANCED BIOSENSOR ELECTRODEMay 2024February 2026Allow2100NoNo
18647446ELECTROCHEMICAL DEVICE AND METHOD FOR SIMULTANEOUS DETECTION AND RECOVERY OF METALS IONS FROM WASTEWATERApril 2024August 2025Allow1530NoNo
18637396ULTRASENSITIVE AND SELECTIVE SENSORS FOR GLUCOSE DETECTION BASED ON THIOL-FUNCTIONALIZED HETEROGENOUS GOLD/GRAPHENE/COPPER FILMApril 2024March 2025Abandon1111NoNo
18414696GAS SENSORJanuary 2024February 2026Allow2510NoNo
18575191FLOW CHANNEL CHIP AND SEPARATION SYSTEMDecember 2023January 2026Allow2511NoNo
18397620ION SENSOR, ION SENSOR MANUFACTURING METHOD, AND ION MEASUREMENT METHODDecember 2023June 2025Allow1810YesNo
18396969SYSTEM AND METHOD FOR SELF-CALIBRATING OF ION SELECTIVE ELECTRODES BASED ON DIFFERENTIAL VOLTAGE MEASUREMENTDecember 2023January 2026Allow2521YesNo
18522887MANIPULATION UNIT AND MANIPULATION EQUIPMENT FOR BIOLOGICAL PARTICLENovember 2023March 2026Allow2701YesNo
18521507SOLID STATE MULTI-ELECTRODE SENSOR ARRAY FOR REAL-TIME MONITORING OF MULTI-GAS MIXTURESNovember 2023August 2025Allow2010NoNo
18500237GAS SENSOR ELEMENT, GAS SENSOR, AND MANUFACTURING METHOD FOR GAS SENSOR ELEMENTNovember 2023December 2025Allow2500NoNo
18496143REAGENTLESS DISSOLUTION AND QUANTIFICATION OF PARTICULATE ANALYTE IN A SAMPLE VIA MEMBRANE ELECTROLYSISOctober 2023February 2026Allow2811YesNo
18468058GAS CONCENTRATION DETECTING APPARATUSSeptember 2023February 2026Allow2910YesNo
18467042GAS SENSOR ELEMENT AND GAS SENSORSeptember 2023January 2026Allow2810YesNo
18282046SENSOR ELEMENTSeptember 2023December 2025Allow2710NoNo
18460866WATER ELECTROLYSIS DEVICE AND METHOD OF CONTROLLING WATER ELECTROLYSIS DEVICESeptember 2023January 2026Allow2910NoNo
18241180ZnO/CARBON ALLOTROPE COMPLEX FOR SENSING OF LOW PPM FORMALDEHYDE GAS AND MANUFACTURING METHOD THEREOFAugust 2023December 2025Allow2710NoNo
18457201DIAGNOSTICS SYSTEMS AND METHODSAugust 2023January 2026Allow2910YesNo
18448984ELECTROCHEMICAL SENSING INTELLIGENT CHAMBER WITH INTEGRATED ENVIRONMENTAL PARAMETERSAugust 2023January 2026Allow2910NoNo
18447820BIOSENSORAugust 2023January 2025Allow1720YesNo
18276618LIPID BILAYER SUBSTRATE AND PRODUCTION METHOD THEREOFAugust 2023January 2026Abandon2901NoNo
18356156METHOD FOR ENHANCING SIGNALS ASSOCIATED WITH ELECTROPHORETICALLY SEPARATED ANALYTES USING POST-ELECTROPHORESIS TREATMENTJuly 2023December 2025Allow2810NoNo
18262118CORROSION SENSOR CIRCUITJuly 2023February 2026Allow3111YesNo
18220750ULTRASENSITIVE AND SELECTIVE SENSORS FOR GLUCOSE DETECTION BASED ON THIOL-FUNCTIONALIZED HETEROGENOUS GOLD/GRAPHENE/COPPER FILMJuly 2023April 2025Abandon2140NoNo
18220746ULTRASENSITIVE AND SELECTIVE SENSORS FOR GLUCOSE DETECTION BASED ON THIOL-FUNCTIONALIZED HETEROGENOUS GOLD/GRAPHENE/COPPER FILMJuly 2023April 2025Abandon2140NoNo
18220753ULTRASENSITIVE AND SELECTIVE SENSORS FOR GLUCOSE DETECTION BASED ON THIOL-FUNCTIONALIZED HETEROGENOUS GOLD/GRAPHENE/COPPER FILMJuly 2023November 2024Abandon1630NoNo
18347411MICROSENSOR FOR MONITORING PHOSPHINE AND PREPARATION METHOD THEREOFJuly 2023March 2026Allow3211YesNo
18333801GAS SENSORJune 2023December 2025Allow3010NoNo
18256887REMOTE CORROSION MONITORING SYSTEMJune 2023January 2026Allow3210NoNo
18204573HOLE ARRAY LAYERED STRUCTURE, PRECOATING METHOD, MEMBRANE FORMING METHOD AND SEQUENCING DEVICEJune 2023February 2026Allow3211YesNo
18036512ARRANGEMENT AND METHOD FOR DETERMINING HYDROGEN PURITYMay 2023January 2026Allow3231YesNo
18035508MEMS-BASED ALCOHOL SENSOR AND INTELLIGENT DEVICEMay 2023December 2025Allow3120YesNo
18312071SYSTEM AND METHOD FOR DETERMINING A PROPERTY OF AN ANALYTEMay 2023October 2025Allow2910YesNo
18306265POROUS NANOSTRUCTURED ELECTRODES FOR DETECTION OF NEUROTRANSMITTERSApril 2023January 2025Allow2111NoNo
18138170GAS SENSORApril 2023July 2025Allow2710YesNo
18296282Resistance-Based Sensor System for Measuring Atmospheric CorrosionApril 2023March 2026Abandon3511NoNo
18128251ZETA-POTENTIAL MEASUREMENT JIG SETMarch 2023July 2025Allow2810NoNo
18191388HIGH-EFFICIENCY SCREENING METHOD FOR RNA-TARGETING DRUGS USING NANOPORESMarch 2023December 2025Allow3210YesNo
18187034GAS SENSOR ELEMENTMarch 2023December 2025Allow3210NoNo
18187108GAS SENSOR AND CONCENTRATION MEASUREMENT METHOD USING GAS SENSORMarch 2023July 2025Allow2810NoNo
18187453REFERENCE ELECTRODES OF ELECTROCHEMICAL SENSORSMarch 2023February 2026Allow3521NoNo
18185487GAS SENSORMarch 2023October 2025Allow3110NoNo
18120302ULTRASENSITIVE AND SELECTIVE SENSORS FOR GLUCOSE DETECTION BASED ON THIO-FUNCIONALIZED HETEROGENOUS GOLD/GRAPHENE/COPPER FILMMarch 2023September 2024Abandon1831NoNo
18173165REFERENCE ELECTRODE, ELECTRODE, AND SENSOR INCLUDING THESEFebruary 2023August 2025Allow2911YesNo
18112933BIOMOLECULE TRANSFER SYSTEM AND METHODSFebruary 2023December 2025Allow3420YesNo
18169420Sensing Device and Sensing MethodFebruary 2023October 2025Allow3210NoNo
18108459SYSTEMS AND METHODS FOR TESTING AND MEASURING COMPOUNDSFebruary 2023October 2023Allow820YesNo
18020475A Sensor System and a Method for Sensing Dielectric Particles of Biological Materials in FluidsFebruary 2023November 2025Abandon3310NoNo
18153009SENSOR ELEMENT AND GAS SENSORJanuary 2023June 2024Abandon1700NoNo
18090169RESIDUAL CHLORINE METER, CONTROL METHOD THEREOF, AND CHLORINE METER SYSTEMDecember 2022December 2024Allow2321YesNo
18085078Silver-Silver Chloride Electrode And Electrical CircuitDecember 2022June 2025Abandon3020YesNo
18068763Electric Field Gradient Focusing DeviceDecember 2022March 2026Allow3920YesNo
17928968GAS MEASURING DEVICE AND METHOD FOR MEASURING CYANOGEN IN THE PRESENCE OF HYDROGEN CYANIDEDecember 2022December 2025Allow3611YesNo
17999766SURFACE CORROSION MONITORING SYSTEMNovember 2022March 2024Abandon1611NoNo
18057622DEVICES, SYSTEMS, AND METHODS FOR MEASURING A SOLUTION CHARACTERISTIC OF A SAMPLE COMPRISING MICROORGANISMSNovember 2022February 2024Allow1411NoNo
17989745GAS SENSOR AND GAS SENSOR OPERATION CONTROL METHODNovember 2022July 2024Allow2010NoNo
17924418ELECTRODEPOSITED METAL MODIFIED LASER SCRIBED GRAPHENE ELECTRODE AND METHODNovember 2022January 2026Abandon3911NoNo
17983052COATED ELECTRODE, ELECTROCHEMICAL SENSOR AND METHOD FOR DETECTION OF HYDROGEN PEROXIDENovember 2022February 2026Allow3920YesNo
17955718AMPEROMETRIC SENSOR WITH BUBBLE SHEDDING CLIPSeptember 2022December 2025Allow3920YesNo
17906517NANOWELL DIAGNOSTIC KIT FOR DIAGNOSING CARDIOVASCULAR DISEASE SUBSTANCES IN BLOODSeptember 2022December 2025Allow3920YesNo
17932266CORROSION-RESISTANCE TESTING METHOD FOR COATED METAL MEMBER, CORROSION-RESISTANCE TESTING APPARATUS FOR COATED METAL MEMBER, CORROSION-RESISTANCE TESTING PROGRAM FOR COATED METAL MEMBER, AND STORAGE MEDIUMSeptember 2022November 2025Allow3811YesNo
17906256MEMBRANE-ELECTRODE ASSEMBLY FOR ELECTROOSMOTIC PUMP, ELECTROOSMOTIC PUMP INCLUDING SAME, AND FLUID PUMPING SYSTEMSeptember 2022September 2025Abandon3610NoNo
17910112MICROFLUIDIC NANOPORE SENSING DEVICESSeptember 2022June 2025Abandon3301NoNo
17940399SENSOR DEVICE AND METHOD FOR MAKING THE SAMESeptember 2022October 2025Allow3711YesNo
17903299SYSTEM AND METHOD FOR MODULATING ELECTRICAL PROCESSES IN CONTACT WITH A CONDENSED PHASESeptember 2022February 2026Allow4121YesNo
17909404ELECTROCHEMICAL SENSOR AND METHOD FOR MANUFACTURING SAMESeptember 2022November 2025Abandon3920NoNo
17892506Capillary Electrophoresis ApparatusAugust 2022September 2025Abandon3750YesNo
17818573BIOSENSORAugust 2022November 2023Allow1511YesNo
17882907GAS SENSOR ELEMENTAugust 2022July 2025Allow3511NoNo
17882889GAS SENSORAugust 2022July 2024Allow2420YesNo
17882910GAS SENSOR ELEMENTAugust 2022February 2026Abandon4221NoNo
17793045SAMPLE AND EVALUATION METHOD FOR MEASURING GALVANIC CORROSION BETWEEN CONDUCTIVE COATING AND PROTECTED SUBSTRATEJuly 2022September 2025Abandon3811NoNo
17855866DIFFERENTIAL CURRENT LIMITING FOR VOLTAMMETRY SENSOR LIFETIME EXTENSIONJuly 2022September 2025Abandon3911NoNo
17853991ELECTRODE, METHOD FOR MANUFACTURING ELECTRODE, ION SENSOR, IN-VIVO COMPONENT MEASURING DEVICE, AND IN-VIVO COMPONENT MEASURING METHODJune 2022July 2025Allow3730YesNo
17846211ELECTROLYTE FOR ELECTROCHEMICAL GAS SENSOR AND ELECTROCHEMICAL GAS SENSOR INCLUDING THE SAMEJune 2022November 2025Abandon4121YesNo
17844110METHOD FOR OPTICAL ACTIVATION OF THE SENSOR SURFACE, IN PARTICULAR FOR ZERO CHLORINE SENSORSJune 2022January 2026Allow4331NoNo
17787537DETERMINING A PROPORTION OF HYDROGEN IN A MIXTURE OF HYDROGEN AND NATURAL GASJune 2022May 2025Abandon3401NoNo
17785507NOVEL TRANSITION METAL ELECTRON TRANSFER COMPLEX HAVING C-N LIGAND AND ELECTROCHEMICAL BIO SENSOR USING SAMEJune 2022June 2025Allow3611YesNo
17784827MICROELECTRODE OF GENE SEQUENCING CHIP, MANUFACTURING METHOD THEREFOR, AND GENE SEQUENCING CHIPJune 2022February 2026Abandon4421NoNo
17830806GAS SENSOR AND POWDER FOR GAS SENSORJune 2022April 2025Allow3411YesNo
17664145GAS SENSORMay 2022July 2025Allow3841NoNo
17777698ION CONCENTRATION PROBE WITH ENHANCED SHIELDINGMay 2022March 2026Allow4612YesNo
17756065METHOD FOR PRODUCING A POLYMER MEMBRANE FOR POTENTIOMETRIC DETECTION OF AN ANALYTE PRESENT IN A FLUIDMay 2022January 2026Abandon4421NoNo
17663084GAS SENSOR AND METHOD OF MANUFACTURING GAS SENSORMay 2022April 2025Abandon3521YesNo
17737914SENSING ASSEMBLYMay 2022December 2025Allow4331YesNo
17736219SENSOR ELEMENT OF GAS SENSOR AND METHOD FOR FORMING PROTECTIVE LAYER OF SENSOR ELEMENTMay 2022May 2025Allow3711YesNo
17773239A MULTI-LAYERED ELECTRODE FOR SENSING PHApril 2022December 2025Abandon4421NoNo
17661294SENSOR ELEMENTApril 2022April 2025Abandon3501NoNo
17773367INTERFERENCE RESISTANT SOLID STATE REFERENCE ELECTRODEApril 2022February 2025Allow3410YesNo
17772655APPARATUS FOR MEASURING CAPSAICIN IN CHILI PEPPERSApril 2022May 2025Abandon3610NoNo
17755390PHOTOCURABLE REAGENT(S) FOR FORMING CHLORIDE ION-SELECTIVE SENSOR(S) AND METHODS OF PRODUCTION AND USE THEREOFApril 2022December 2025Allow4331YesNo
17718491SYSTEM FOR BLOOD GLUCOSE METER COUPLED WITH MOBILE ELECTRONIC DEVICEApril 2022April 2025Abandon3610NoNo
17767918WATER-USING APPARATUSApril 2022December 2025Allow4431YesNo
17709684DERIVED ALKALINITYMarch 2022August 2025Allow4021YesNo
17763315ORGANIC ELECTROCHEMICAL TRANSISTOR FOR BIOLOGICAL ELEMENTMarch 2022February 2025Abandon3511YesNo
17702005SENSOR ELEMENT AND GAS DETECTION METHOD USING SENSOR ELEMENTMarch 2022December 2024Allow3221YesNo
17699707GAS SENSORMarch 2022October 2024Abandon3121NoNo
17699745GAS SENSORMarch 2022June 2024Abandon2710NoNo
17696614DEVICE FOR TESTING ELECTRICAL AND/OR ELECTROCHEMICAL PROPERTIES IN A 10 CUBIC CENTIMETER OR LESS TEST CELLMarch 2022April 2025Allow3740YesNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner QIAN, SHIZHI.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
9
Examiner Affirmed
2
(22.2%)
Examiner Reversed
7
(77.8%)
Reversal Percentile
90.0%
Higher than average

What This Means

With a 77.8% reversal rate, the PTAB has reversed the examiner's rejections more often than affirming them. 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
17
Allowed After Appeal Filing
8
(47.1%)
Not Allowed After Appeal Filing
9
(52.9%)
Filing Benefit Percentile
75.7%
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, 47.1% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is in the top 25% across the USPTO, indicating that filing appeals is particularly effective here. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

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.

Examiner QIAN, SHIZHI - Prosecution Strategy Guide

Executive Summary

Examiner QIAN, SHIZHI works in Art Unit 1795 and has examined 166 patent applications in our dataset. With an allowance rate of 52.4%, this examiner allows applications at a lower rate than most examiners at the USPTO. Applications typically reach final disposition in approximately 40 months.

Allowance Patterns

Examiner QIAN, SHIZHI's allowance rate of 52.4% places them in the 14% 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 QIAN, SHIZHI receive 2.84 office actions before reaching final disposition. This places the examiner in the 83% percentile for office actions issued. This examiner issues more office actions than most examiners, which may indicate thorough examination or difficulty in reaching agreement with applicants.

Prosecution Timeline

The median time to disposition (half-life) for applications examined by QIAN, SHIZHI is 40 months. This places the examiner in the 23% 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 +65.7% benefit to allowance rate for applications examined by QIAN, SHIZHI. This interview benefit is in the 98% percentile among all examiners. Recommendation: Interviews are highly effective with this examiner and should be strongly considered as a prosecution strategy. Per MPEP § 713.10, interviews are available at any time before the Notice of Allowance is mailed or jurisdiction transfers to the PTAB.

Request for Continued Examination (RCE) Effectiveness

When applicants file an RCE with this examiner, 21.0% of applications are subsequently allowed. This success rate is in the 24% 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 6.5% of cases where such amendments are filed. This entry rate is in the 7% 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, 33.3% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 33% 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 55.0% of appeals filed. This is in the 26% percentile among all examiners. Of these withdrawals, 27.3% occur early in the appeal process (after Notice of Appeal but before Appeal Brief). Strategic Insight: This examiner shows below-average willingness to reconsider rejections during appeals. Be prepared to fully prosecute appeals if filed.

Petition Practice

When applicants file petitions regarding this examiner's actions, 137.5% are granted (fully or in part). This grant rate is in the 97% percentile among all examiners. Strategic Note: Petitions are frequently granted regarding this examiner's actions compared to other examiners. Per MPEP § 1002.02(c), various examiner actions are petitionable to the Technology Center Director, including prematureness of final rejection, refusal to enter amendments, and requirement for information. If you believe an examiner action is improper, consider filing a petition.

Examiner Cooperation and Flexibility

Examiner's Amendments: This examiner makes examiner's amendments in 0.0% of allowed cases (in the 8% percentile). This examiner rarely makes examiner's amendments compared to other examiners. You should expect to make all necessary claim amendments yourself through formal amendment practice.

Quayle Actions: This examiner issues Ex Parte Quayle actions in 0.0% of allowed cases (in the 9% percentile). This examiner rarely issues Quayle actions compared to other examiners. Allowances typically come directly without a separate action for formal matters.

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.
  • Expect multiple rounds of prosecution: This examiner issues more office actions than average. Address potential issues proactively in your initial response and consider requesting an interview early in prosecution.
  • Prioritize examiner interviews: Interviews are highly effective with this examiner. Request an interview after the first office action to clarify issues and potentially expedite allowance.
  • 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.