USPTO Examiner CHEN PO CHIH - Art Unit 1621

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
18765867BENZOATE DERIVATIVESJuly 2024August 2025Allow1311NoNo
18755058PCNA INHIBITORSJune 2024July 2025Allow1210NoNo
18643710COPPER COMPLEXES FOR TREATMENT OF NEURODEGENERATIVE DISORDERSApril 2024August 2025Allow1611NoNo
186067783-(3-FLUOROPHENYL)-5-(4-METHOXYBENZYLTHIO)-4-PHENYL-4H-1,2,4-TRIAZOLE AS AN ANTIMICROBIAL COMPOUNDMarch 2024December 2024Allow911NoNo
18428190PROBE RELATED REAGENTS AND METHODSJanuary 2024January 2026Allow2421NoNo
18423156CARDIAC SARCOMERE INHIBITORSJanuary 2024December 2024Allow1110NoNo
18420478ISOXAZOLE DERIVATIVES AS NUCLEAR RECEPTOR AGONISTS AND USES THEREOFJanuary 2024February 2025Abandon1310NoNo
18390494SMALL MOLECULE MODULATORS OF PANTOTHENATE KINASESDecember 2023August 2025Allow2020NoNo
18526028ELECTROPHILIC NITROALKENE BENZOIC ACID DERIVATES AS THERAPEUTIC DRUGS IN AMYOTROPHIC LATERAL SCLEROSIS (ALS) AND OTHER NEURODEGENERATIVE CONDITIONSDecember 2023April 2025Abandon1610NoNo
18522995HETEROARYL-BIPHENYL AMINES FOR THE TREATMENT OF PD-L1 DISEASESNovember 2023April 2025Allow1620NoNo
183828123-(3-FLUOROPHENYL)-5-(4-METHOXYBENZYLTHIO)-4-PHENYL-4H-1,2,4-TRIAZOLE AS AN ANTIMICROBIAL COMPOUNDOctober 2023August 2024Abandon1011NoNo
18381291ETHYL 6-(5-(3-FLUOROPHENYL)-4-PHENYL-4H-1,2,4-TRIAZOL-3-YLTHIO)HEXANOATE AS AN ANTIMICROBIAL COMPOUNDOctober 2023February 2024Allow301NoNo
18381069ETHYL {[4-BENZOYL-5-(3-FLUOROPHENYL)-4H-1,2,4-TRIAZOL-3-YL]THIO}ACETATE AS AN ANTIMICROBIAL COMPOUNDOctober 2023March 2024Allow501NoNo
18370519PHARMACEUTICAL COMPOSITIONS COMPRISING WRN HELICASE INHIBITORSSeptember 2023September 2024Allow1221NoNo
18363714Tandem Activity-Based Sensing and Labeling Strategy for Reactive Oxygen Species ImagingAugust 2023January 2026Allow3010NoNo
18320241COMPOUND AS PPAR AGONIST AND APPLICATION THEREOFMay 2023October 2025Allow2921YesNo
18296742IONIZABLE LIPID COMPOUNDS AND LIPID NANOPARTICLE COMPOSITIONSApril 2023January 2026Allow3361YesNo
18029754TRIALKYL SULFONIUM SALTSMarch 2023March 2026Allow3511NoNo
18028878NOVEL NAPHTHALIMIDE SULFONATE DERIVATIVE, AND PHOTOACID GENERATOR AND PHOTORESIST COMPOSITION WHICH COMPRISE SAMEMarch 2023January 2026Allow3401NoNo
18028184METHOD FOR PRODUCING ASYMMETRIC LINEAR CARBONATEMarch 2023February 2026Allow3510NoNo
18108045BRM TARGETING COMPOUNDS AND ASSOCIATED METHODS OF USEFebruary 2023March 2025Abandon2511NoNo
18107786MODULATORS OF ALPHA-1 ANTITRYPSINFebruary 2023September 2025Abandon3201NoNo
181033718-Amino-2-Oxo-1,3-Diaza-Spiro-[4.5]-Decane DerivativesJanuary 2023December 2024Abandon2210NoNo
181033193-(Carboxymethyl)-8-Amino-2-Oxo-1,3-Diaza-Spiro-[4.5]-Decane DerivativesJanuary 2023December 2024Abandon2210NoNo
181031803-((Hetero-)Aryl)-Alkyl-8-Amino-2-Oxo-1,3-Diaza-Spiro-[4.5]-Decane DerivativesJanuary 2023December 2024Abandon2210NoNo
181029833-(Carboxyethyl)-8-Amino-2-Oxo-1,3-Diaza-Spiro-[4.5]-Decane DerivativesJanuary 2023November 2024Abandon2110NoNo
18159647PHOTOREDOX-CATALYZED DIRECT C-H FUNCTIONALIZATION OF ARENESJanuary 2023September 2025Allow3222NoNo
18155399Analogs of Nitrofuran Antibiotics to Combat ResistanceJanuary 2023October 2025Allow3330NoNo
18154520BENZOATE DERIVATIVESJanuary 2023April 2024Allow1511NoNo
18085869METHODS OF TREATING PROSTATE CANCERDecember 2022September 2025Abandon3310NoNo
18078630DISELENIDE-BASED ORGANIC PROTECTIVE FILMSDecember 2022October 2023Allow1021NoNo
18062959ORGANIC PHOTOELECTRIC CONVERSION ELEMENT, IMAGE PICKUP ELEMENT, AND IMAGE PICKUP APPARATUSDecember 2022May 2025Abandon2911NoNo
18076422Compound, And Method For Producing Regulatory T CellsDecember 2022December 2025Abandon3611NoNo
179862073-((Hetero-)Aryl)-8-Amino-2-Oxo-1,3-Diaza-Spiro-[4.5]-Decane DerivativesNovember 2022September 2024Abandon2210NoNo
17982664FORMS AND COMPOSITIONS OF INHIBITORS OF JAK2November 2022July 2024Allow2121NoNo
17978848SOLID FORMS OF(Z)-4-(5-((3-BENZYL-4-OXO-2-THIOXOTHIAZOLIDIN-5-YLIDENE)METHYL)FURAN-2-YL)BENZOIC ACIDNovember 2022October 2024Allow2420NoNo
18045390STAT DEGRADERS AND USES THEREOFOctober 2022January 2023Allow300NoNo
17907152NOVEL 9H-FLUORENE DERIVATIVES OR THEIR PHARMACEUTICALLY ACCEPTABLE SALTSSeptember 2022October 2025Allow3610NoNo
17931377SOLID FORMS OF AN FGFR INHIBITOR AND PROCESSES FOR PREPARING THE SAMESeptember 2022October 2025Allow3710YesNo
17939512PIPERAZINE AND PIPERIDINE DERIVATIVES, THEIR SYNTHESIS AND USE THEREOF IN INHIBITING VDAC OLIGOMERIZATION, APOPTOSIS AND MITOCHONDRIA DYSFUNCTIONSeptember 2022May 2023Abandon801NoNo
17889047ESTERS OF A RETINOID AND A TOCOPHEROL OR TERT-BUTYLHYDROQUINONE AND PREPARATIONS THEREOFAugust 2022February 2025Abandon3021NoNo
17884292ISOTHIOCYANATE FUNCTIONAL SURFACTANTS, FORMULATIONS INCORPORATING THE SAME, AND ASSOCIATED METHODS OF USEAugust 2022June 2025Allow3511NoNo
17875982IONIZABLE LIPIDOIDS AND THEIR USESJuly 2022June 2024Allow2210NoNo
17794971MESOIONIC INSECTICIDESJuly 2022November 2025Abandon4010NoNo
17792005AZIRIDINYL FUNCTIONAL COMPOUNDJuly 2022February 2026Allow4321YesNo
17862071LIPIDS FOR LIPID NANOPARTICLE DELIVERY OF ACTIVE AGENTSJuly 2022June 2024Allow2410NoNo
17849949Cytotoxic Actin-Targeting CompoundsJune 2022November 2024Allow2820NoNo
17849281RESMETIROM CRYSTAL, PREPARATION METHOD FOR SAME, AND USES THEREOFJune 2022August 2025Allow3710NoNo
17787992DEUCRAVACITINIB CRYSTAL FORM, PREPARATION METHOD THEREFOR AND USE THEREOFJune 2022October 2025Abandon4010NoNo
17807389METHODS FOR PREPARING SUBSTITUTED CHROMANONE DERIVATIVESJune 2022July 2024Allow2510NoNo
17787273PROCESS FOR PREPARING [3-CHLORO-2-[3-[2-[1-(2-CHLOROACETYL)-4-PIPERIDYL]THIAZOL-4-YL]-4,5-DIHYDROISOXAZOL-5-YL]PHENYL] METHANESULFONATEJune 2022August 2025Allow3810NoNo
17784969COMPOUNDS FOR INHIBITING NEOVASCULARIZATION FACTORS AND USE THEREOFJune 2022October 2025Allow4010NoNo
17784405NITROGEN-CONTAINING HETEROCYCLIC AUTOTAXIN INHIBITOR, AND COMPOSITION CONTAINING SAME AND USE THEREOFJune 2022January 2026Abandon4301NoNo
17830158ANTI-VIRAL DRUGJune 2022November 2024Allow3011NoNo
17780969A PHARMACEUTICAL ORAL DOSAGE FORM OF Q203May 2022February 2026Allow4510NoNo
17780047CANNABIGEROL DERIVATIVES AND USE THEREOF AS CANNABINOID RECEPTOR MODULATORSMay 2022April 2024Allow2320NoNo
17752649BICYCLIC COMPOUNDSMay 2022April 2024Allow2310NoNo
17779491LIPOPHOSPHONOXINS, THEIR PREPARATION AND USEMay 2022November 2025Allow4110NoNo
17748292COMPOSITION OF A LIPOPHILIC AGENT FOR SOLUTION PHASE SYNTHESIS OF BIOMOLECULESMay 2022August 2025Allow3921YesNo
17746678INHIBITION OF NEUROLOGICAL INJURIES DUE TO INFECTIONS VIA ADMINISTRATION OF BUTANETAP AND ANALOGS THEREOFMay 2022December 2025Allow4321YesNo
17738166PROTEIN COMPLEX COMPRISING NON-PEPTIDYL POLYMER-COUPLED FATTY ACID DERIVATIVE COMPOUND AS LINKER AND PREPARATION METHOD THEREFORMay 2022March 2025Allow3530YesNo
17662246INDOLE AHR INHIBITORS AND USES THEREOFMay 2022April 2024Allow2310NoNo
17736669STAT DEGRADERS AND USES THEREOFMay 2022April 2024Allow2310NoNo
177327247,8-DIHYDROBENZO[E]PYRIDO[3,4-C]AZOCINE-2,5(3H,6H)-DIONE DERIVATIVES USEFUL AS A FACTOR XIA INHIBITORSApril 2022September 2023Allow1710NoNo
17661182HETERO-BICYCLIC INHIBITORS OF KRASApril 2022June 2023Allow1421NoYes
17730948PCNA INHIBITORSApril 2022March 2024Allow2310NoNo
17729652COMPOSITIONS AND METHODS FOR TREATING AN INFECTIONApril 2022April 2024Allow2401NoNo
17717305SALT, ACID GENERATOR, RESIST COMPOSITION AND METHOD FOR PRODUCING RESIST PATTERNApril 2022January 2026Allow4521NoNo
17704892MODULATORS OF SESTRIN-GATOR2 INTERACTION AND USES THEREOFMarch 2022April 2025Allow3630NoNo
17654547Bromodomain InhibitorsMarch 2022June 2024Abandon2710NoNo
17687188CHEMICAL COMPOUNDSMarch 2022June 2024Abandon2710NoNo
17685778CARDIAC SARCOMERE INHIBITORSMarch 2022September 2023Allow1910NoNo
17640135MECHANOREDOX REACTION USING PIEZOELECTRIC MATERIAL, AND PRODUCTION METHOD USING SAID REACTIONMarch 2022July 2025Abandon4111NoNo
17668519PHARMACEUTICAL COMPOSITIONS OF FUROSEMIDE AND USES THEREOFFebruary 2022February 2025Allow3610NoNo
17587304USE OF SMALL MOLECULE INHIBITORS TO KLF10 FOR MODULATION OF T REGULATORY CELLS AND CANCER IMMUNOTHERAPYJanuary 2022May 2025Allow4021NoNo
17597894DIHYDROPYRIMIDINE DERIVATIVES AND USES THEREOF IN THE TREATMENT OF HBV INFECTION OR OF HBV-INDUCED DISEASESJanuary 2022August 2025Abandon4210NoNo
17627799METHOD OF INDUCING BACTERIAL HEAT SENSITIVITYJanuary 2022January 2026Abandon4801NoNo
17575080COMPOSITIONS AND METHODS RELATING TO NOVEL SULFONO-gamma-AA PEPTIDESJanuary 2022August 2024Allow3121NoNo
17621950POLYMORPHS OF 1-(2-((((TRANS)-3-FLUORO-1-(3-FLUOROPYRIDIN-2-YL)CYCLOBUTYL)METHYL)AMINO)PYRIMIDIN-5-YL)-1H-PYRROLE-3-CARBOXAMIDEDecember 2021September 2025Abandon4501NoNo
17621502ISOQUINOLINONE DERIVATIVES SERVING AS ROCK PROTEIN KINASE INHIBITORS AND USE THEREOFDecember 2021August 2025Allow4411NoNo
17556188TREATMENT OF C3 GLOMERULOPATHY USING A C5A INHIBITORDecember 2021May 2024Abandon2820NoNo
17595819FUSED HETEROCYCLE DERIVATIVES AS CAPSID ASSEMBLY MODULATORSNovember 2021April 2025Abandon4000NoNo
17613800Pain Relieving SprayNovember 2021September 2025Abandon4501NoNo
17612713CARBENE MASS TAGGINGNovember 2021December 2025Allow6021NoNo
17595537AZEPINES AS HBV CAPSID ASSEMBLY MODULATORSNovember 2021April 2025Abandon4100NoNo
174527861-HETEROCYCLYL ISOCHROMANYL COMPOUNDS AND ANALOGS FOR TREATING CNS DISORDERSOctober 2021May 2024Allow3010NoNo
17605750PHARMACEUTICAL COMPOUNDS AND THERAPEUTIC METHODSOctober 2021December 2024Allow3810NoNo
17605780IONIZABLE AMINE LIPIDS AND LIPID NANOPARTICLESOctober 2021December 2025Abandon4911NoNo
17506748IMMUNOSUPPRESSIVE DOSAGE FORMS AND METHODS OF USEOctober 2021January 2026Abandon5121YesNo
17506614DUAL-RESPONSIVE NANOPARTICLES FOR ENHANCED ANTIBACTERIAL EFFICACYOctober 2021April 2025Allow4211NoNo
17503961NEUROPROTECTIVE COMPOUNDS AND METHODS OF USEOctober 2021February 2026Abandon5221NoNo
17500479COMPOSITIONS AND METHODS FOR INHIBITING PROTEOLYTIC ACTIVATION OF VIRUSESOctober 2021November 2025Abandon4922YesNo
17499433RAPAMYCIN DERIVATIVESOctober 2021March 2024Allow2910NoNo
17602412METHODS AND MATERIALS FOR GENDER-DEPENDENT TREATMENT OF CARDIOVASCULAR DYSFUNCTIONOctober 2021July 2025Allow4511NoNo
17489149METHODS FOR TREATING CONGENITAL DISORDERS OF GLYCOSYLATIONSeptember 2021December 2025Abandon5111NoNo
17599785IMIDAZOLINE DERIVATIVES AS CXCR4 MODULATORSSeptember 2021March 2026Abandon5421NoNo
17442206NOVEL DEPSIDE DIMERIC COMPOUNDS FOR SKELETAL MUSCLE MODULATION, METHODS AND USES THEREOFSeptember 2021February 2025Abandon4001NoNo
17480424ENZYME INHIBITORSSeptember 2021February 2025Abandon4101NoNo
17479438ASYMMETRIC METAL COMPLEX AS AN ACTIVE MATERIAL OF A FLOW BATTERYSeptember 2021September 2024Allow3621NoNo
17475733HETEROCYCLIC COMPOUNDSeptember 2021April 2025Allow4330NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner CHEN, PO-CHIH.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
1
Examiner Affirmed
0
(0.0%)
Examiner Reversed
1
(100.0%)
Reversal Percentile
91.1%
Higher than average

What This Means

With a 100.0% 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
3
Allowed After Appeal Filing
1
(33.3%)
Not Allowed After Appeal Filing
2
(66.7%)
Filing Benefit Percentile
50.5%
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, 33.3% 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.

Examiner CHEN, PO-CHIH - Prosecution Strategy Guide

Executive Summary

Examiner CHEN, PO-CHIH works in Art Unit 1621 and has examined 217 patent applications in our dataset. With an allowance rate of 79.7%, this examiner has a below-average tendency to allow applications. Applications typically reach final disposition in approximately 37 months.

Allowance Patterns

Examiner CHEN, PO-CHIH's allowance rate of 79.7% places them in the 49% percentile among all USPTO examiners. This examiner has a below-average tendency to allow applications.

Office Action Patterns

On average, applications examined by CHEN, PO-CHIH receive 2.15 office actions before reaching final disposition. This places the examiner in the 58% 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 CHEN, PO-CHIH is 37 months. This places the examiner in the 31% percentile for prosecution speed. Prosecution timelines are slightly slower than average with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +3.4% benefit to allowance rate for applications examined by CHEN, PO-CHIH. This interview benefit is in the 25% 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, 23.4% of applications are subsequently allowed. This success rate is in the 32% 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 48.4% of cases where such amendments are filed. This entry rate is in the 73% percentile among all examiners. Strategic Recommendation: This examiner shows above-average receptiveness to after-final amendments. If your amendments clearly overcome the rejections and do not raise new issues, consider filing after-final amendments before resorting to an RCE.

Pre-Appeal Conference Effectiveness

When applicants request a pre-appeal conference (PAC) with this examiner, 0.0% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 0% percentile among all examiners. Note: Pre-appeal conferences show limited success with this examiner compared to others. While still worth considering, be prepared to proceed with a full appeal brief if the PAC does not result in favorable action.

Appeal Withdrawal and Reconsideration

This examiner withdraws rejections or reopens prosecution in 66.7% of appeals filed. This is in the 47% percentile among all examiners. Of these withdrawals, 50.0% 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, 38.5% are granted (fully or in part). This grant rate is in the 27% 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 0.0% of allowed cases (in the 0% 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 17.3% of allowed cases (in the 92% percentile). Per MPEP § 714.14, a Quayle action indicates that all claims are allowable but formal matters remain. This examiner frequently uses Quayle actions compared to other examiners, which is a positive indicator that once substantive issues are resolved, allowance follows quickly.

Prosecution Strategy Recommendations

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

    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.