USPTO Examiner CHENG KAREN - Art Unit 1626

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
18597990CRYSTALLINE FORMS OF A NEUROACTIVE STEROIDMarch 2024June 2024Allow300NoNo
183893934,4-DIVINYLAZOARYLENE-BRIDGED DIRUTHENIUM COMPLEX BEARING Ru(CO)CL(PiPr3)2 AS AN INORGANIC CATALYSTNovember 2023April 2024Allow510NoNo
183891294,4'-DIVINYLAZOBENZENE-BRIDGED DIRUTHENIUM COMPLEX BEARING Ru(CO)Cl(PiPr3)2 MOIETIES AS AN INORGANIC CATALYSTNovember 2023March 2024Allow410NoNo
183858538-((2-HYDROXY-5-METHYLPHENYL)DIAZENYL)NAPHTHALENE-1,3-DISULFONIC ACID AS AN ANTIOXIDANT COMPOUNDOctober 2023January 2024Allow310NoNo
183851478-(4-CHLOROBENZYLIDENEAMINO)NAPHTHALENE-1,3-DISULFONIC ACID AS AN ANTIOXIDANT COMPOUNDOctober 2023March 2024Allow510NoNo
183852168-(3-CHLOROBENZYLIDENEAMINO)NAPHTHALENE-1,3-DISULFONIC ACID AS AN ANTIOXIDANT COMPOUNDOctober 2023February 2024Allow410NoNo
183829152-(BENZO[D]OXAZOL-2-YL)-N'-(4-(DIMETHYLAMINO)BENZOYLOXY)ACETIMIDAMIDE AS AN ANTIMICROBIAL COMPOUNDOctober 2023January 2024Allow200NoNo
18372771ARYL ALKYNAMIDE DERIVATIVESSeptember 2023November 2023Allow100YesNo
182422354-(1-(2-HYDROXYPROPYL)-4,5-DIPHENYL-1H-IMIDAZOL-2-YL)PYRIDIN-3-OL AS AN ANTIMICROBIAL COMPOUNDSeptember 2023February 2024Allow601NoNo
18237710ENHANCEMENT OF CURCUMIN PLASMA LEVELS USING EUCALYPTOL CO-ADMINISTRATIONAugust 2023April 2024Allow830NoNo
18363942CRYSTALLINE FORMS OF A NEUROACTIVE STEROIDAugust 2023December 2023Allow400NoNo
18138244ENHANCEMENT OF CURCUMIN PLASMA LEVELS USING EUCALYPTOL COADMINISTRATIONApril 2023August 2024Abandon1630NoNo
18166478FULL CONTINUOUS-FLOW PREPARATION METHOD OF VITAMIN B1February 2023September 2023Allow700NoNo
18057861BEZOXAZINE DERIVATIVES USEFUL AS MONOACYLGLYCEROL LIPASE INHIBITORSNovember 2022May 2024Abandon1811NoNo
17975310PHOTOACTIVE FLUOROPHORES AND METHODS OF IN VIVO LABELINGOctober 2022January 2024Allow1421YesNo
17957851COMPOSITIONS AND METHODS FOR TREATING HEADACHESSeptember 2022March 2024Abandon1810NoNo
17856761SUBSTITUTED PYRIMIDINES, PHARMACEUTICAL COMPOSITIONS AND THERAPEUTIC METHODS THEREOFJuly 2022February 2024Allow2011YesNo
17806990PRODRUGS, ANALOGS OR DERIVATIVES OF ANTHOCYANIDIN AS ANTIVIRAL AGENTSJune 2022July 2024Abandon2502NoNo
17761501EPOXIDE WITH LOW TOTAL CHLORINE CONTENT AND NO HEAVY METAL RESIDUES AND PREPARATION METHOD THEREOFMarch 2022February 2024Allow2321NoNo
17665366EXTERNAL PREPARATION OF IMIDACLOPRID, PREPARATION METHOD AND USE THEREOFFebruary 2022June 2024Abandon2911NoNo
17631898PURIFICATION OF AROMA CHEMICALSFebruary 2022May 2024Allow2710NoNo
17504307HETEROARYL-THIO-SUBSTITUTED PYRONESOctober 2021May 2024Allow3121YesNo
17500681DIRECT AMPK ACTIVATORSOctober 2021July 2024Abandon3301NoNo
17449131FUSED IMIDAZO-PIPERIDINE JAK INHIBITOR COMPOUNDSeptember 2021March 2024Allow3000NoNo
17464598HIGHLY POLARIZABLE 3D ORGANIC PEROVSKITES AND ELECTRO-OPTIC MATERIALS COMPRISING SAMESeptember 2021August 2023Allow2301NoNo
17428415METHOD FOR PREPARING EFINACONAZOLE USING IONIC LIQUID AS MEDIUMAugust 2021February 2024Allow3011NoNo
17426971HETEROCYCLIC COMPOUNDJuly 2021April 2024Allow3300YesNo
17365213Compounds and Methods for the Treatment of COVID-19July 2021December 2023Allow2910NoNo
17312195METHOD FOR PREPARING BRIVARACETAM AND INTERMEDIATE THEREOFJune 2021August 2024Allow3810NoNo
173430163-(1-OXOISOINDOLIN-2-YL)PIPERIDINE-2,6-DIONE DERIVATIVES AND USES THEREOFJune 2021May 2024Abandon3510NoNo
17311746SOLID STATE FORMS OF REPROXALAPJune 2021May 2024Allow3501YesNo
17335196IMIDAZOPYRIMIDINE AND IMIDAZOTRIAZINE DERIVATIVE, AND PHARMACEUTICAL COMPOSITION COMPRISING THE SAMEJune 2021March 2024Allow3400NoNo
17332324TRIAZOLE BISPHOSPHONATE GERANYLGERANYL DIPHOSPHATE SYNTHASE INHIBITORSMay 2021May 2024Allow3511NoNo
17295789N-TRIFLUORMETHYLCARBONYL COMPOUNDS AND METHODS FOR THEIR SYNTHESISMay 2021April 2024Abandon3511NoNo
17318672SUBSTRATE SELECTIVE INHIBITORS OF INSULIN-DEGRADING ENZYME (IDE) AND USES THEREOFMay 2021June 2024Abandon3701NoNo
17288351Methods of Treating Diseases Using Kinase ModulatorsApril 2021September 2024Abandon4101NoNo
17287442POSITIVE ALLOSTERIC MODULATORS OF THE MUSCARINIC ACETYLCHOLINE RECEPTOR M1April 2021April 2024Allow3510NoNo
17226359GRP94 SELECTIVE INHIBITORS AND USES THEREOFApril 2021November 2023Allow3101NoNo
17283049PRODRUGS OF CGRP ANTAGONISTSApril 2021March 2024Allow3510YesNo
17282274Photoresponsive Nutlin Derivatives and Uses ThereofApril 2021February 2024Allow3410NoNo
17281544PREPARATION METHOD FOR EFINACONAZOLEMarch 2021October 2024Abandon4221NoNo
17279471CRYSTAL FORM OF UPADACITINIB AND PREPARATION METHOD AND USE THEREOFMarch 2021August 2024Abandon4101NoNo
17271966INHIBITION OF RIP KINASES FOR TREATING NEURODEGENERATIVE DISORDERSFebruary 2021September 2024Abandon4321NoNo
17177617CHEMICAL COMPOUNDSFebruary 2021April 2024Allow3811NoNo
17267866NOVEL SUBSTITUTED TETRAHYDROQUINOLINE COMPOUNDS AS INDOLEAMINE 2,3-DIOXYGENASE INHIBITORSFebruary 2021January 2024Allow3510YesNo
17265986PYRIDINE MACROCYCLE COMPOUNDS AS ASK1 INHIBITING AGENTSFebruary 2021October 2023Allow3200YesNo
17263177PYRIDINYLMETHYLENEPIPERIDINE DERIVATIVES AND USES THEREOFJanuary 2021October 2023Allow3300YesNo
17263416[1,2,4]TRIAZOLO[1,5-A]PYRIDINE COMPOUND AS JAK INHIBITOR AND USE THEREOFJanuary 2021December 2023Allow3410NoNo
17153593PROCESS FOR THE PREPARATION OF BACLOFEN AND ITS INTERMEDIATEJanuary 2021July 2024Abandon4211NoNo
17259565METHOD OF PREPARING MALONONITRILE OXIME ETHER COMPOUND AND INTERMEDIATE COMPOUNDJanuary 2021November 2023Allow3521NoNo
17143602SALTS AND CRYSTAL FORMS OF GABA-A POSITIVE ALLOSTERIC MODULATORJanuary 2021May 2024Abandon4010NoNo
17254914NAPHTHYRIDINONE COMPOUNDS USEFUL AS T CELL ACTIVATORSDecember 2020August 2023Allow3200YesNo
17124346COMPOUNDS AND COMPOSITIONS AS INHIBITORS OF ENDOSOMAL TOLL-LIKE RECEPTORSDecember 2020August 2024Abandon4411NoNo
17117916DEUTERATED DERIVATIVES OF PSILOCYBIN AND USES THEREOFDecember 2020March 2021Allow310NoNo
17053683SULFORHODAMINE PHOSPHORAMIDITE DYESNovember 2020April 2024Allow4111NoNo
17089058Tricyclic Benzoxaborole Compounds and Uses ThereofNovember 2020March 2024Abandon4101NoNo
170689852-ARYLBENZIMIDAZOLES AS PPARGC1A ACTIVATORS FOR TREATING NEURODEGENERATIVE DISEASESOctober 2020July 2021Allow920NoNo
16892786PROTEIN TYROSINE PHOSPHATASE INHIBITORS AND METHODS OF USE THEREOFJune 2020July 2020Allow100NoNo
168880402-ARYLBENZIMIDAZOLES AS PPARGC1A ACTIVATORS FOR TREATING NEURODEGENERATIVE DISEASESMay 2020July 2020Allow100NoNo
16880337NOVEL CHIRAL N-ACYL-5,6,7(8-SUBSTITUTED)-TETRAHYDRO-[1,2,4]TRIAZOLO[4,3-A]PYRAZINES AS SELECTIVE NK-3 RECEPTOR ANTAGONISTS, PHARMACEUTICAL COMPOSITION, METHODS FOR USE IN NK-3 RECEPTOR MEDIATED DISORDERS AND CHIRAL SYNTHESIS THEREOFMay 2020October 2020Allow510NoNo
168359383-(1-OXOISOINDOLIN-2-YL)PIPERIDINE-2,6-DIONE DERIVATIVES AND USES THEREOFMarch 2020March 2021Allow1110NoNo
16774268CHEMICAL COMPOUNDSJanuary 2020November 2020Allow1010NoNo
16633263PROCESS FOR THE PREPARATION OF GLYCOPYRROLATE TOSYLATEJanuary 2020October 2020Allow900NoNo
16719805ETHER COMPOUNDS AND USES THEREOFDecember 2019September 2020Allow910NoNo
16698057SALTS AND CRYSTAL FORMS OF GABA-A POSITIVE ALLOSTERIC MODULATORNovember 2019October 2020Allow1010NoNo
16695253Tricyclic Benzoxaborole Compounds and Uses ThereofNovember 2019August 2020Allow810NoNo
16687474MODULATORS OF HEMOGLOBINNovember 2019January 2020Allow200NoNo
16662997PARG INHIBITORY COMPOUNDSOctober 2019December 2020Allow1410NoNo
16607609METHODS OF USE FOR TRISUBSTITUTED BENZOTRIAZOLE DERIVATIVES AS DIHYDROOROTATE OXYGENASE INHIBITORSOctober 2019February 2021Allow1610NoNo
16660411ZIRCONIUM METAL-ORGANIC FRAMEWORK AND A METHOD OF DETECTING COPPER AND CHROMATE IONSOctober 2019December 2020Allow1310NoNo
16656940FUSED IMIDAZO-PIPERIDINE JAK INHIBITOR COMPOUNDOctober 2019July 2021Allow2100NoNo
16655636METHOD FOR PREPARING SODIUM NITROTETROZOLATE USING CATION EXCHANGE RESINOctober 2019November 2020Allow1301NoNo
16654281BETA-LACTAMASE INHIBITORS AND USES THEREOFOctober 2019March 2020Allow500NoNo
16605564TRIAZOLE BISPHOSPHONATE GERANYLGERANYL DIPHOSPHATE SYNTHASE INHIBITORSOctober 2019February 2021Allow1610NoNo
16579150SUBSTITUTED PYRAZOLO[1,5-A]PYRIDINE COMPOUNDS AS RET KINASE INHIBITORSSeptember 2019December 2019Allow300NoNo
16578276UBIQUITIN-SPECIFIC-PROCESSING PROTEASE 7 (USP7) MODULATORS AND USES THEREOFSeptember 2019September 2020Allow1200NoNo
16496031HYDRATED CRYSTALLINE FORM OF 2-ACRYLAMIDO-2-METHYLPROPANE SULFONIC ACIDSeptember 2019June 2020Allow910YesNo
16492434CATHEPSIN-D AND ANGIOGENESIS INHIBITORS AND COMPOSITIONS THEREOF FOR TREATING BREAST CANCERSeptember 2019November 2020Allow1410NoNo
16491642MANUFACTURE OF A CRYSTALLINE PHARMACEUTICAL PRODUCTSeptember 2019July 2021Allow2211NoNo
16491459AMINOPYRIMIDINE FIVE-MEMBERED HETEROCYCLIC COMPOUND, AND INTERMEDIATE, PREPARATION METHOD, PHARMACEUTICAL COMPOSITION AND APPLICATION THEREOFSeptember 2019March 2021Allow1811NoNo
16491185AMINE SALT OF (1R, 3S)-3-(5-CYANO-4-PHENYL-1,3-THIAZOL-2-YLCARBAMOYL)CYCLOPENTANE CARBOXYLIC ACIDSeptember 2019December 2019Allow300NoNo
16560087CRYSTALLINE FORMS OF A PHOSPHOINOSITIDE 3-KINASE (PI3K) INHIBITORSeptember 2019July 2021Allow2310NoNo
16551694HETEROCYCLIC COMPOUNDS AS KINASE INHIBITORSAugust 2019December 2019Allow300NoNo
16487441PROCESS FOR THE PREPARATION OF 2-CYANOIMIDAZOLE COMPOUNDSAugust 2019January 2021Allow1711NoNo
16486031POLYFLUOROALKYL PHOSPHORIC ACID ESTER OR SALT THEREOF, AND MOLD-RELEASING AGENT COMPRISING THE SAME AS AN ACTIVE INGREDIENTAugust 2019May 2020Allow900NoNo
16540747Arginase Inhibitors and Their Therapeutic ApplicationsAugust 2019September 2020Allow1311NoNo
16484938PROCESS FOR PREPARING BRIVARACETAMAugust 2019February 2021Abandon1820NoNo
165321063-(1-OXOISOINDOLIN-2-YL)PIPERIDINE-2,6-DIONE DERIVATIVES AND USES THEREOFAugust 2019November 2019Allow400NoNo
16483341ANTI-FIBROTIC COMPOUNDSAugust 2019January 2021Allow1711NoNo
16482947COMPOSITIONS AND METHODS FOR INHIBITING RETICULON 4August 2019February 2021Abandon1901NoNo
16527171C17-HETEROARYL DERIVATIVES OF OLEANOLIC ACID AND METHODS OF USE THEREOFJuly 2019September 2020Allow1410NoNo
165246182-OXINDOLE COMPOUNDSJuly 2019April 2020Allow900NoNo
16521691STEREOCHEMICALLY DEFINED POLYPROPIONATES AND METHODS FOR MAKING AND USING THE SAMEJuly 2019May 2020Allow1010NoNo
16517369SALTS AND CRYSTAL FORMS OF GABA-A POSITIVE ALLOSTERIC MODULATORJuly 2019November 2019Allow400NoNo
16514413COMPOUNDS IJuly 2019February 2021Allow1911NoNo
16509388MEROPENEM DERIVATIVES AND USES THEREOFJuly 2019April 2021Allow2121NoNo
16475672METHOD OF ADMINISTERING NITROXYL DONATING COMPOUNDSJuly 2019September 2020Allow1500NoNo
16448066NOVEL COMPOUNDSJune 2019May 2020Allow1111NoNo
16446604COMPOSITIONS AND METHODS FOR THE TREATMENT OF INFLAMMATIONJune 2019May 2020Allow1111NoNo
16466107FRAGRANCE AND FLAVOR MATERIALSJune 2019January 2020Allow800NoNo

Appeals Overview

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

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
1
Examiner Affirmed
1
(100.0%)
Examiner Reversed
0
(0.0%)
Reversal Percentile
0.3%
Lower than average

What This Means

With a 0.0% 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
11
Allowed After Appeal Filing
2
(18.2%)
Not Allowed After Appeal Filing
9
(81.8%)
Filing Benefit Percentile
19.2%
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, 18.2% 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 CHENG, KAREN - Prosecution Strategy Guide

Executive Summary

Examiner CHENG, KAREN works in Art Unit 1626 and has examined 545 patent applications in our dataset. With an allowance rate of 76.3%, this examiner has a below-average tendency to allow applications. Applications typically reach final disposition in approximately 18 months.

Allowance Patterns

Examiner CHENG, KAREN's allowance rate of 76.3% places them in the 34% percentile among all USPTO examiners. This examiner has a below-average tendency to allow applications.

Office Action Patterns

On average, applications examined by CHENG, KAREN receive 1.17 office actions before reaching final disposition. This places the examiner in the 19% percentile for office actions issued. This examiner issues significantly fewer office actions than most examiners.

Prosecution Timeline

The median time to disposition (half-life) for applications examined by CHENG, KAREN is 18 months. This places the examiner in the 93% percentile for prosecution speed. Applications move through prosecution relatively quickly with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +25.4% benefit to allowance rate for applications examined by CHENG, KAREN. This interview benefit is in the 76% 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, 33.2% of applications are subsequently allowed. This success rate is in the 65% percentile among all examiners. Strategic Insight: RCEs show above-average effectiveness with this examiner. Consider whether your amendments or new arguments are strong enough to warrant an RCE versus filing a continuation.

After-Final Amendment Practice

This examiner enters after-final amendments leading to allowance in 52.6% 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, 150.0% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 88% percentile among all examiners. Strategic Recommendation: Pre-appeal conferences are highly effective with this examiner compared to others. Before filing a full appeal brief, strongly consider requesting a PAC. The PAC provides an opportunity for the examiner and supervisory personnel to reconsider the rejection before the case proceeds to the PTAB.

Appeal Withdrawal and Reconsideration

This examiner withdraws rejections or reopens prosecution in 87.5% of appeals filed. This is in the 78% percentile among all examiners. Of these withdrawals, 85.7% occur early in the appeal process (after Notice of Appeal but before Appeal Brief). Strategic Insight: This examiner frequently reconsiders rejections during the appeal process compared to other examiners. Per MPEP § 1207.01, all appeals must go through a mandatory appeal conference. Filing a Notice of Appeal may prompt favorable reconsideration even before you file an Appeal Brief.

Petition Practice

When applicants file petitions regarding this examiner's actions, 44.9% are granted (fully or in part). This grant rate is in the 50% 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 1.1% of allowed cases (in the 69% 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 1.9% of allowed cases (in the 65% 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:

  • 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.
  • Request pre-appeal conferences: PACs are highly effective with this examiner. Before filing a full appeal brief, request a PAC to potentially resolve issues without full PTAB review.
  • Appeal filing as negotiation tool: This examiner frequently reconsiders rejections during the appeal process. Filing a Notice of Appeal may prompt favorable reconsideration during the mandatory appeal conference.

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.