USPTO Examiner CHENG KAREN - Art Unit 1623

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
17057946METHODS FOR THE TREATMENT OF PSORIATIC ARTHRITISNovember 2020October 2024Allow4720YesNo
17046161FOXM1 INHIBITOR COMPOSITIONS AND METHODS OF USING THE SAMEOctober 2020May 2024Allow4311YesNo
17040003PROCESS FOR OXIDISING A SUBSTRATESeptember 2020January 2025Abandon5211NoNo
16982395PYRAZOLO[3,4-B]PYRAZINE SHP2 PHOSPHATASE INHIBITORS AND METHODS OF USE THEREOFSeptember 2020June 2024Allow4511YesNo
16975134Heterobicyclic Carboxylic Acids and Salts ThereofAugust 2020December 2024Allow5221NoNo
16819829ANTIDIABETIC COMPOUNDSMarch 2020April 2020Allow100NoNo
16690556ANTIDIABETIC COMPOUNDSNovember 2019March 2020Allow420NoNo
165321183-(1-OXOISOINDOLIN-2-YL)PIPERIDINE-2,6-DIONE DERIVATIVES AND USES THEREOFAugust 2019December 2019Allow500NoNo
16344340CRYSTALLINE FORM OF (R)-4-HYDROXY-2-OXO-1-PYRROLIDINEACETAMIDE, PREPARATION METHOD THEREFOR AND USE THEREOFApril 2019December 2019Allow800NoNo
16280534Antifungal Compound ProcessFebruary 2019May 2019Allow210NoNo
16260864COMPOUNDS FOR TREATING PARASITIC INFECTIONSJanuary 2019January 2020Allow1201NoNo
16244950NOVEL CHIRAL DIHYDROBENZOOXAPHOSPHOLE LIGANDS AND SYNTHESIS THEREOFJanuary 2019September 2019Allow801NoNo
16166582METHODS FOR PRODUCING OPTICALLY ACTIVE VALERIC ACID DERIVATIVESOctober 2018December 2019Allow1420NoNo
16156718SOLID STATE FORMS OF SPIRO-OXINDOLE COMPOUNDSOctober 2018August 2019Allow1000NoNo
16114714PROCESS FOR THE PREPARATION OF ACLIDINIUM BROMIDEAugust 2018October 2019Allow1401NoNo
16113533PYRAZOLOPYRIMIDINE DERIVATIVES AS BTK INHIBITORS FOR THE TREATMENT OF CANCERAugust 2018February 2019Allow610NoNo
16107220COMPOUNDS AND THEIR METHODS OF USEAugust 2018February 2020Allow1811NoNo
16060486Hexahydropyrazinotriazinone Derivatives as Kinase InhibitorsJune 2018June 2019Allow1200NoNo
15768953KINASE INHIBITOR, AND PREPARING METHOD AND PHARMACEUTICAL USE THEREOFApril 2018March 2020Allow2321YesNo
15934246TREATMENT METHOD UTILIZING PYRROLIDINE-2, 5-DIONE DERIVATIVES AS IDO1 INHIBITORSMarch 2018April 2019Allow1310NoNo
15919460TRIAZOLONE COMPOUNDS AS MPGES-1 INHIBITORSMarch 2018February 2019Allow1100NoNo
15886766N-PHENYL-CARBOXAMIDE DERIVATIVES AND THE USE THEREOF AS MEDICAMENTS FOR THE TREATMENT OF HEPATITIS BFebruary 2018October 2018Allow901NoNo
15580137FUSED TRICYCLIC IMIDAZO PYRAZINES AS MODULATORS OF TNF ACTIVITYDecember 2017February 2019Allow1401NoNo
15832799NOVEL CHIRAL DIHYDROBENZOOXAPHOSPHOLE LIGANDS AND SYNTHESIS THEREOFDecember 2017October 2018Allow1001NoNo
15801201PYRIDAZINE DERIVATIVES AS RORc MODULATORSNovember 2017July 2019Allow2020NoNo
15783783NOVEL COUMARINYL-THIAZOLE-SULFONYL CONJUGATE AND PREPARATION THEREOFOctober 2017August 2018Allow1010NoNo
15553622Heterocyclic Compounds and Methods of UseAugust 2017September 2018Allow1211YesNo
15552997SUBSTITUTED N-BICYCLO-2-ARYL-QUINOLIN-4-CARBOXAMIDES AND USE THEREOFAugust 2017June 2018Allow1010NoNo
15551132INDAZOLYL THIADIAZOLAMINES AND RELATED COMPOUNDS FOR INHIBITION OF RHO-ASSOCIATED PROTEIN KINASE AND THE TREATMENT OF DISEASEAugust 2017June 2018Allow1000YesNo
15546348SPIROFURANONE COMPOUNDS, DERIVATIVES THEREOF AND PROCESSES FOR THEIR PREPARATIONJuly 2017March 2019Allow2021NoNo
15612240HEPATITIS B ANTIVIRAL AGENTSJune 2017September 2018Allow1511YesNo
15527909SPIRO-ISOQUINOLINE-1,4'-PIPERIDINE COMPOUNDS HAVING MULTIMODAL ACTIVITY AGAINST PAINMay 2017March 2019Allow2230NoNo
15474193COMPOUNDS FOR THE INHIBITION OF CYCLOPHILINS AND USES THEREOFMarch 2017January 2018Allow920YesNo
15512501METHODS FOR PRODUCING OPTICALLY ACTIVE VALERIC ACID DERIVATIVESMarch 2017June 2018Allow1511NoNo
15328341N-METHYL-D-ASPARTATE RECEPTOR MODULATORS AND METHODS OF MAKING AND USING SAMEJanuary 2017February 2018Allow1301YesNo
15305808SMALL MOLECULE INHIBITORS OF G PROTEIN COUPLED RECEPTOR 6 KINASES POLYPEPTIDESOctober 2016May 2017Allow700YesNo
15228681TRIAZOLONE COMPOUNDS AS MPGES-1 INHIBITORSAugust 2016December 2017Allow1610NoNo
15101380N-CYCLOALKYL-N-{[2-(1-SUBSTITUTEDCYCLOALKYL)PHENYL]METHYLENE}-(THIO)CARBOXAMIDE DERIVATIVESJune 2016April 2018Allow2330YesNo
15086120COMPOUNDSMarch 2016July 2017Allow1610YesNo
14783207NOVEL TRIAZOLINTHIONE DERIVATIVESOctober 2015November 2016Allow1401YesNo
14782889METHOD FOR OBTAINING SOLUTIONS OF OTA IN A CONCENTRATED SULFURIC ACID MEDIUM; SAID SOLUTIONS; AND METHOD FOR PREPARING ONTAOctober 2015February 2017Allow1601NoNo
14777630SMALL MOLECULE INHIBITORS OF PI3-KINASE SIGNALINGSeptember 2015March 2017Allow1810NoNo
147774811,2,5-SUBSTITUTED BENZIMIDAZOLES AS FLAP MODULATORSSeptember 2015November 2016Allow1410YesNo
14766646ANTIVIRAL COMPOUNDSAugust 2015October 2017Allow2640NoNo
146491463,3'-DINITRO-5,5'-BIS-TRIAZOLE-1,1'-DIOLJune 2015August 2016Allow1400NoNo
14690537PROCESSES FOR THE PREPARATION OF 3,5-DISUBSTITUTED-1,2,4-OXADIAZOLESApril 2015October 2015Allow600NoNo
14436035RIVAROXABAN INTERMEDIATE AND PREPARATION THEREOFApril 2015June 2016Allow1400NoNo
14639603CRYSTALLINE TRIPEPTIDE EPOXY KETONE PROTEASE INHIBITORSMarch 2015March 2016Allow1310YesNo
14409806MANUFACTURE OF 2-(5-BROMO-4-(4-CYCLOPROPYLNAPHTHALEN-1-YL)-4H-1,2,4-TRIAZOL-3-YLTHIO)ACETIC ACIDDecember 2014December 2015Allow1200NoNo
14517956ANTI-OBESITY AGENT COMPRISING COMPOUND CONTAINING BENZOTROPOLONE RINGOctober 2014July 2015Allow900YesNo
14489231PHARMACEUTICALLY ACCEPTABLE SALTS OF 3,5-DIAMINOPYRAZOLE KINASE INHIBITORSSeptember 2014September 2016Allow2411NoNo
14384840PESTICIDAL ARYLPYRROLIDINESSeptember 2014August 2015Allow1201YesNo
14473720PROCESS FOR PRODUCING ISOXAZOLINE DERIVATIVESAugust 2014February 2016Allow1710NoNo
14377839SUBSTITUTED 1H-INDAZOL-1-OL ANALOGS AS INHIBITORS OF BETA CATENIN/TCF PROTEIN-PROTEIN INTERACTIONSAugust 2014November 2015Allow1501YesNo
14376931PROCESS FOR THE PREPARATION OF N-HYDROXY-1-(1-ALKYL-1H-TETRAZOL-5-YL)-1-PHENYLMETHANIMINE DERIVATIVESAugust 2014August 2015Allow1200NoNo
14338357PHASE-TRANSFER CATALYSED FORMATION OF N-(SUBSTITUTED PHENYL) SULFONAMIDES IN WATERJuly 2014July 2016Allow2420NoNo
14338829CYCLIC COMPOUND, METHOD FOR PRODUCING CYCLIC COMPOUND, AND METHOD FOR MODIFYING BIOLOGICAL MOLECULEJuly 2014February 2016Allow1901NoNo
14372893TRICYCLIC SULFONAMIDE COMPOUNDS AND METHODS OF MAKING AND USING SAMEJuly 2014January 2016Allow1801NoNo
14307272DERIVATIVES OF 1-(SUBSTITUTED SULFONYL)-2-AMINOIMIDAZOLINE AS ANTITUMOR AND ANTIPROLIFERATIVE AGENTSJune 2014November 2014Allow510NoNo
14357085METHOD FOR PRODUCING 4-BENZYL-1-METHYL-6-OXABICYCLO[3,2,0]HEPTANE DERIVATIVEMay 2014October 2014Allow500YesNo
14357058METHOD FOR MANUFACTURING 4-BENZYL-1-METHYL-6-OXABICYCLO[3,2,0]HEPTANE DERIVATIVE AND METHOD FOR MANUFACTURING AZOLE DERIVATIVEMay 2014March 2015Allow1010NoNo
142371171,2,4-TRIAZOLYL-SUBSTITUTED KETOENOLSMay 2014September 2015Allow1911YesNo
14356232COMBINATION THERAPY OF HSP90 INHIBITORS WITH BRAF INHIBITORSMay 2014March 2016Allow2320NoNo
14264574OPTICALLY ACTIVE FLUCONAZOLE ANALOGUES CONTAINING THIOPHENES AS ANTIFUNGAL AGENTSApril 2014June 2016Allow2530YesNo
14249226DERIVATIVES OF 1-(SUBSTITUTED SULFONYL)-2-AMINOIMIDAZOLINE AS ANTITUMOR AND ANTIPROLIFERATIVE AGENTSApril 2014March 2015Allow1120YesNo
14220650COMPOUNDSMarch 2014July 2015Allow1601NoNo
14213240AZOLE DERIVATIVES, METHODS FOR PRODUCING THE SAME, INTERMEDIATE THEREOF, AGRO-HORTICULTURAL AGENTSMarch 2014June 2015Allow1500YesNo
14213043AZOLE DERIVATIVES, METHODS FOR PRODUCING THE SAME, INTERMEDIATE THEREOF, AGRO-HORTICULTURAL AGENTSMarch 2014May 2015Allow1400YesNo
14232434FUNGICIDAL ALKYL- AND ARYL-SUBSTITUTED 2-[2-CHLORO-4-(DIHALO-PHENOXY)-PHENYL]-1-[1,2,4]TRIAZOL-1-YL-ETHANOL COMPOUNDSJanuary 2014May 2015Allow1611NoNo
14124546AZOLE DERIVATIVE, METHOD FOR PRODUCING SAME, INTERMEDIATE COMPOUND, AND AGRICULTURAL OR HORTICULTURAL CHEMICAL AGENT AND INDUSTRIAL MATERIAL PROTECTING AGENTJanuary 2014January 2015Allow1301YesNo
14110315G-QUADRUPLEX STABILISING AGENTDecember 2013May 2015Allow1901YesNo
14123409TRIAZOLONE COMPOUNDS AS mPGES-1 INHIBITORSDecember 2013March 2015Allow1500YesNo
14074023ARYL OXADIAZOLE DERIVATIVES AS SPHINGOSINE 1-PHOSPHATE (S1P) RECEPTOR MODULATORSNovember 2013March 2014Allow400YesNo
13988361PROCESS FOR THE PREPARATION OF DEFERASIROXOctober 2013January 2015Allow2001NoNo
14055442CROSS-METATHESIS REACTION OF FUNCTIONALIZED AND SUBSTITUTED OLEFINS USING GROUP 8 TRANSITION METAL CARBENE COMPLEXES AS METATHESIS CATALYSTSOctober 2013March 2016Allow2911NoNo
14009452N1- and N2-CARBAMOYL-1,2,3-TRIAZOLE SERINE HYDROLASE INHIBITORS AND METHODSOctober 2013April 2015Allow1811YesNo
14041539SUBSTITUTED ARYL 1 ,2,4-OXADIAZOLES DERIVATIVES AS SPHINGOSINE-1 PHOSPHATE RECEPTORS MODULATORSSeptember 2013January 2014Allow410YesNo
14035644CRYSTALLINE TRIPEPTIDE EPOXY KETONE PROTEASE INHIBITORSSeptember 2013September 2014Allow1200YesNo
139855271,2,3-TRIAZOLE CONTAINING ARTEMISININ COMPOUNDS AND PROCESS FOR PREPARATION THEREOFAugust 2013December 2014Allow1610NoNo
13979577POLYMORPHISM IN 5-AMINO-1-(2,6-DICHLORO-4-TRIFLUOROMETHYLPHENYL)-3-CYANO-4-TRIFLUORO METHYL SULFINYL PYRAZOLEJuly 2013October 2015Allow2711NoNo
13936553METHOD FOR PRODUCING IMATINIB BASEJuly 2013March 2015Allow2120NoNo
13933616PROCESSES FOR THE PREPARATION OF 3,5-DISUBSTITUTED-1,2,4-OXADIAZOLESJuly 2013February 2015Allow1910NoNo
13872860Process for the synthesis of halogenated cyclic compoundsApril 2013November 2014Allow1910NoNo
13697802PREPARATION OF POSACONAZOLE INTERMEDIATESMarch 2013February 2015Allow2711YesNo
13818660PROCESS FOR PREPARATION OF RUFINAMIDEFebruary 2013July 2014Allow1601YesNo
13816292PROCESS FOR THE PREPARATION OF TAPENTADOLFebruary 2013May 2014Allow1511YesNo
13813688PENTAERYTHRITOL TETRAESTERFebruary 2013October 2013Allow800NoNo
13812117BETA-KETOCARBONYLQUAT COMPOUNDS AND PROCESS FOR THE PREPARATION THEREOFJanuary 2013January 2014Allow1111NoNo
13705506OPTICALLY ACTIVE AMMONIUM SALT COMPOUND, PRODUCTION INTERMEDIATE THEREOF, AND PRODUCTION METHOD THEREOFDecember 2012November 2014Allow2311NoNo
13663741LINKED DIBENZIMIDAZOLE ANTIVIRALSOctober 2012November 2014Allow2511YesNo
13634263CYCLIC COMPOUND, METHOD FOR PRODUCING CYCLIC COMPOUND, AND METHOD FOR MODIFYING BIOLOGICAL MOLECULESeptember 2012May 2014Allow2011YesNo
13624107ARYL (1H-1,2,4-TRIAZOL-1-YL) COMPOUND, AND PROCESS FOR PRODUCTION THEREOFSeptember 2012October 2013Allow1211NoNo
13509125CRYSTALLINE FORMS OF BOSENTAN SALTS AND PROCESSES FOR THEIR PREPARATIONJuly 2012December 2013Allow1911YesNo
13555804COMPOUND THAT CAN INHIBIT UBC13-UEV INTERACTIONS, PHARMACEUTICAL COMPOSITIONS AND THERAPEUTIC USESJuly 2012March 2014Allow1900YesNo
13508269AZOLE DERIVATIVES, METHODS FOR PRODUCING THE SAME, INTERMEDIATE THEREOF, AGRO-HORTICULTURAL AGENTSMay 2012December 2013Allow1910YesNo
13393374OXOPIPERAZINE DERIVATIVES FOR THE TREATMENT OF PAIN AND EPILEPSYMay 2012August 2013Allow1811YesNo
13392583Polymorphic Forms of ManidipineMay 2012February 2015Allow3511YesNo
13502465PI3 KINASE INHIBITORSApril 2012August 2013Allow1610YesNo
13353392INHIBITORS OF AUTOTAXINJanuary 2012October 2013Allow2121NoNo
13257887CRYSTALLINE TRIPEPTIDE EPOXY KETONE PROTEASE INHIBITORSDecember 2011September 2013Allow2411YesNo

Appeals Overview

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

Strategic Value of Filing an Appeal

Total Appeal Filings
2
Allowed After Appeal Filing
2
(100.0%)
Not Allowed After Appeal Filing
0
(0.0%)
Filing Benefit Percentile
95.0%
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, 100.0% 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

Filing a Notice of Appeal is strategically valuable. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Examiner CHENG, KAREN - Prosecution Strategy Guide

Executive Summary

Examiner CHENG, KAREN works in Art Unit 1623 and has examined 124 patent applications in our dataset. With an allowance rate of 99.2%, this examiner allows applications at a higher rate than most examiners at the USPTO. Applications typically reach final disposition in approximately 16 months.

Allowance Patterns

Examiner CHENG, KAREN's allowance rate of 99.2% places them in the 92% percentile among all USPTO examiners. This examiner is more likely to allow applications than most examiners at the USPTO.

Office Action Patterns

On average, applications examined by CHENG, KAREN receive 1.03 office actions before reaching final disposition. This places the examiner in the 8% 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 16 months. This places the examiner in the 97% percentile for prosecution speed. Applications move through prosecution relatively quickly with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +1.6% benefit to allowance rate for applications examined by CHENG, KAREN. This interview benefit is in the 22% 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, 35.4% of applications are subsequently allowed. This success rate is in the 80% percentile among all examiners. Strategic Insight: RCEs are highly effective with this examiner compared to others. If you receive a final rejection, filing an RCE with substantive amendments or arguments has a strong likelihood of success.

After-Final Amendment Practice

This examiner enters after-final amendments leading to allowance in 58.8% of cases where such amendments are filed. This entry rate is in the 85% percentile among all examiners. Strategic Recommendation: This examiner is highly receptive to after-final amendments compared to other examiners. Per MPEP § 714.12, after-final amendments may be entered "under justifiable circumstances." Consider filing after-final amendments with a clear showing of allowability rather than immediately filing an RCE, as this examiner frequently enters such amendments.

Appeal Withdrawal and Reconsideration

This examiner withdraws rejections or reopens prosecution in 100.0% of appeals filed. This is in the 86% percentile among all examiners. Of these withdrawals, 100.0% 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, 68.8% are granted (fully or in part). This grant rate is in the 74% 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 7.3% of allowed cases (in the 91% 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 0.0% of allowed cases (in the 1% 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:

  • Consider after-final amendments: This examiner frequently enters after-final amendments. If you can clearly overcome rejections with claim amendments, file an after-final amendment before resorting to an RCE.
  • RCEs are effective: This examiner has a high allowance rate after RCE compared to others. If you receive a final rejection and have substantive amendments or arguments, an RCE is likely to be successful.
  • 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.
  • 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.