USPTO Examiner DAVIS SHENG HAN - Art Unit 1732

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19251836ZEOLITES BASED ON WASTE INCINERATION FLY ASH AND PREPARATION METHODS THEREOFJune 2025December 2025Allow510NoNo
19027341PREPARATION METHOD FOR ACTIVATED COKE CATALYST CAPABLE OF SIMULTANEOUSLY REMOVING NO, SO2 AND HClJanuary 2025December 2025Allow1110NoNo
18965959INCREASING YIELD OF HYPOBROMITE WHEN A BROMIDE SALT IS REACTED WITH BLEACHDecember 2024September 2025Allow911NoNo
18870477TREATMENT METHOD AND APPLICATION FOR LATERITE NICKEL ORE LEACHING SOLUTION WITH HIGH CALCIUM AND MAGNESIUM CONTENTNovember 2024April 2025Allow510NoNo
18730414DEVICE SYSTEM AND METHOD HAVING SINTERING FLUE GAS CO CATALYTIC HEAT EXCHANGE AND MEDIUM-AND-LOW-TEMPERATURE SCR DENITRATION CONNECTED IN SERIESJuly 2024March 2025Allow810NoNo
18772490NOX STORAGE CATALYST AND METHOD FOR PREPARING THE SAMEJuly 2024November 2025Allow1610NoNo
18772460PROCESS FOR REMOVING HYDROGEN SULFIDE FROM SOUR GASES WITH ZIF-8 MIXED METAL HYDROXIDES COMPOSITESJuly 2024January 2025Allow610NoNo
18733491Zeolite Syntheses Using Diquaternary Structure Directing AgentsJune 2024April 2025Allow1101NoNo
18653084LOW alpha-RAY EMISSION STANNOUS OXIDE AND METHOD OF PRODUCING THE SAMEMay 2024January 2026Allow2010NoNo
18643610METHODS AND COMPOSITIONS FOR RECOVERY OF LITHIUM FROM LIQUID SOLUTIONS WITH NANOPARTICLESApril 2024November 2025Allow1921NoNo
18608727CARBON DIOXIDE-CAPTURING CEMENT COMPOSITIONS AND RELATED METHODSMarch 2024March 2025Abandon1221NoNo
18538125MFI ZEOLITES USING DABCO AND METHYLAMINE REAGENTSDecember 2023June 2025Allow1811NoNo
18515107POLYSILOCARB BASED SILICON CARBIDE MATERIALS, APPLICATIONS AND DEVICESNovember 2023December 2025Abandon2531NoNo
18471926SYNTHETIC SOIL AND METHODS FOR PRODUCING SAME FROM WASTESeptember 2023February 2025Abandon1701NoNo
18464991MODIFIED SULFURIC ACID AND USES THEREOFSeptember 2023February 2025Allow1710NoNo
18449209SYNTHESIS OF LITHIUM LANTHANUM ZIRCONATE FROM NANOCRYSTALLINE LANTHANUM ZIRCONATEAugust 2023March 2025Allow1911NoNo
18342829MECHANOCHEMICAL PROCESS TO PRODUCE EXFOLIATED NANOPARTICLESJune 2023December 2024Allow1710NoNo
18337461SYNTHESIS METHOD FOR DIRECTLY PREPARING H-TYPE MOLECULAR SIEVE HAVING CHA FRAMEWORK TYPE AND USE THEREOFJune 2023March 2025Allow2111NoNo
18331995MECHANOCHEMICAL PROCESS TO PRODUCE EXFOLIATED NANOPARTICLESJune 2023February 2026Abandon3231YesNo
18317078OXIDATIVE REFORMING AND ELECTROLYSIS SYSTEM AND PROCESS FOR HYDROGEN GENERATIONMay 2023July 2024Allow1421NoNo
18044607PROCESS FOR PREPARING ZEOLITE MATERIAL HAVING AN AFX FRAMEWORK STRUCTURE AND ZEOLITE MATERIAL AS PREPAREDMarch 2023December 2025Allow3320NoNo
18044259PERFORMANCE ENHANCEMENT OF A PLATINUM-CONTAINING CATALYST VIA EXHAUST GAS HYDROGEN ENRICHMENTMarch 2023January 2026Allow3410NoNo
18177848PROCESS FOR FABRICATING WIRE-EMBEDDED ZEOLITE STRUCTURES WITH BARE WIRE LEADSMarch 2023October 2025Allow3110NoNo
18042649Particulate FilterFebruary 2023February 2026Abandon3501NoNo
18011173TERNARY COMPOSITE MATERIAL HAVING NIO NANOSHEET/BIMETALLIC CECUOX MICROSHEET CORE-SHELL STRUCTURE, AND PREPARATION AND APPLICATION THEREOFFebruary 2023January 2026Allow3711NoNo
18019610DENITRATION CATALYST AND METHOD FOR PURIFYING EXHAUST GASFebruary 2023January 2026Allow3520YesNo
18152379METHOD TO SYNTHESIZE CRYSTALLINE MATERIALS IN THE PRESENCE OF ODSO WITH IMPROVED ZEOLITE CRYSTALLIZATION RATES AND ENHANCED RELATIVE CRYSTALLINITYJanuary 2023April 2025Allow2810NoNo
18015133METHOD FOR REDUCING NITROGEN DIOXIDE IN EXHAUST GAS OF STATIONARY SOURCE WITHOUT INJECTION OF REDUCING AGENTJanuary 2023June 2025Abandon3010NoNo
18089676SYNTHESIS OF TON FRAMEWORK TYPE MOLECULAR SIEVESDecember 2022January 2025Allow2530YesNo
18089423METHOD AND SYSTEM FOR CONTROLLING MERCURY EMISSIONS FROM COAL-FIRED THERMAL PROCESSESDecember 2022January 2026Allow3721YesNo
18076845PRECURSOR DERIVED SEMICONDUCTOR DEVICES HAVING PN JUNCTIONSDecember 2022June 2024Allow1921YesNo
17999567LIQUID FORMULATION FOR HYDROGEN STORAGENovember 2022March 2026Allow3911NoNo
18057910METHOD TO CO-SYNTHESIZE AMORPHOUS AND CRYSTALLINE MATERIALS IN THE PRESENCE OF ODSONovember 2022September 2025Allow3420YesNo
18056483MOLECULAR SIEVE SSZ-122, ITS SYNTHESIS AND USENovember 2022March 2024Abandon1610NoNo
17979502PROCESS AND APPARATUS FOR REMOVING IMPURITIES FROM CRYSTALLIZED METAL SULFATESNovember 2022August 2025Allow3340YesNo
17920872FLEXIBLE METHOD OF PARTIAL OXIDATIONOctober 2022December 2025Abandon3810NoNo
17959737CREATION OF AN IRON PRODUCT FOR WASTEWATER TREATMENTOctober 2022February 2026Allow4021NoNo
17958938Removal of Sulfur Compounds from GasOctober 2022January 2026Allow3911NoNo
17958963SCR CatalystOctober 2022November 2024Abandon2621NoNo
17934667CARBON DIOXIDE-CAPTURING CEMENT COMPOSITOINS AND RELATED METHODSSeptember 2022January 2024Allow1521YesNo
17912628CEMENT PLUG COMPOSITION FOR APPLICATION TO A CERAMIC HONEYCOMB BODY AND METHOD OF FORMING PLUGGED CERAMIC HONEYCOMB BODY WITH THE SAMESeptember 2022September 2025Allow3611NoNo
17932937PROMOTOR FOR ACTIVE PHASE METALS DISPERSION IN HYDROPROCESSING CATALYSTS AND METHOD OF MAKING THE CATALYSTSeptember 2022February 2025Allow2912NoNo
17931454CATALYST FOR TREATING EXHAUST GASSeptember 2022November 2024Allow2620NoNo
17931415TRANSITION METAL/ZEOLITE SCR CATALYSTSSeptember 2022May 2024Allow2111NoNo
17941824SUBSTRATE-FREE 2D TELLURENESeptember 2022September 2023Allow1220NoNo
17929711CO2 RECYCLING METHOD AND SYSTEMSeptember 2022December 2025Allow4011NoNo
17881173METHOD OF MAKING ZEOLITEAugust 2022September 2025Allow3711NoNo
17759933METHOD FOR GENERATING CARBON MONOXIDE, METHOD FOR PRODUCING PRECURSOR, AND MATERIAL FOR CHEMICAL LOOPING SYSTEMAugust 2022January 2026Allow4211NoNo
17876959MULTI-FUNCTIONAL COMPOSITION OF MATTER FOR REMOVAL OF MERCURY FROM HIGH TEMPERATURE FLUE GAS STREAMSJuly 2022May 2025Abandon3421YesNo
17862345METHOD AND SYSTEM FOR FILTERING FORMALDEHYDE FROM INDOOR AIRJuly 2022February 2026Abandon4321NoYes
17758287Production System and Method for Insoluble SulfurJune 2022September 2025Allow3910NoNo
17850115METHOD OF ZEOLITE SYNTHESIS INCLUDING pH-MODIFIED WATER-SOLUBLE OXIDIZED DISULFIDE OIL COMPOSITIONJune 2022December 2023Allow1710NoNo
17850285METHOD OF SYNTHESIZING MATERIALS INTEGRATING SUPERNATANT RECYCLEJune 2022December 2023Allow1710NoNo
17785856CONTINUOUS SYNTHESIS OF A TITANOSILICATE ZEOLITIC MATERIAL, SAID ZEOLITIC MATERIAL, MOLDING PREPARED THEREOF, AND THEIR USEJune 2022July 2025Allow3721NoNo
17837371New Polar Oxysulfide for Nonlinear Optical ApplicationsJune 2022December 2023Allow1910NoNo
17739301SYNTHESIS OF ALUMINUM-CONTAINING CIT-13 AND CIT-15 MOLECULAR SIEVESMay 2022March 2026Abandon4640NoNo
17662377Catalytic Composition for Treating a NOx-containing Exhaust GasMay 2022October 2023Allow1710NoNo
17736785METHOD FOR PREPARING ELECTRONIC GRADE SULFURIC ACID FROM WASTE SULFURIC ACID SOLUTIONMay 2022May 2023Allow1210NoNo
17755555SUPPORTED CATALYST, PREPARATION METHOD THEREFOR AND APPLICATION THEREOFMay 2022January 2025Allow3311NoNo
17772065Intramolecular Pi-Stacking Structure Directing Agents and Molecular Sieves Synthesized TherefromApril 2022June 2025Allow3811NoNo
17722485METHOD OF DEALUMINATING ALUMINUM-CONTAINING MATERIALSApril 2022August 2023Allow1600NoNo
17769400PROCESS FOR PREPARATION OF CHLORINE FROM HYDROGEN CHLORIDEApril 2022November 2025Allow4311NoNo
17769551BIS(FLUOROSULFONYL)IMIDE SALTS AND PREPARATION METHOD THEREOFApril 2022August 2025Allow4111NoNo
17720072METHOD FOR MANUFACTURE OF FAUJASITE ZEOLITE INCLUDING ZEOLITE Y IN THE PRESENCE OF ODSOApril 2022August 2025Allow4021NoNo
17719972METHOD FOR MANUFACTURE OF ZEOLITE BETA IN THE PRESENCE OF ODSOApril 2022June 2023Allow1400NoNo
17703067SYNTHESIS OF *MRE FRAMEWORK TYPE MOLECULAR SIEVESMarch 2022January 2024Allow2230YesNo
17701815PHOSPHORUS OXIDE AND PHOSPHORIC ACID PRODUCTION PROCESSESMarch 2022June 2025Allow3911NoNo
17763153BLACK PHOSPHORUS NANOSHEET, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOFMarch 2022March 2025Allow3610NoNo
17655901FUEL ADDITIVES FOR STORAGE AND RAPID GENERATION OF HYDROGENMarch 2022September 2025Allow4221NoNo
17691563ORGANOTEMPLATE-FREE SYNTHESIS OF MOLECULAR SIEVE SSZ-122March 2022February 2024Allow2311NoNo
17689865NOVEL ENZYMATIC PHASE TRANSFER SOLVENT FOR CO2/H2S CAPTUREMarch 2022April 2025Allow3712NoNo
17641009FERRITE POWDER, FERRITE RESIN COMPOSITE MATERIAL, AND ELECTROMAGNETIC SHIELDING MATERIAL, ELECTRONIC MATERIAL, OR ELECTRONIC COMPONENTMarch 2022January 2026Allow4720NoNo
17653755Mixed Slurry of Strong and Weak Graphene Oxides and Preparation Method of Mixed Slurry, and Composite Film of Strong and Weak Graphene Oxides and Preparation Method of Composite FilmMarch 2022December 2022Allow911NoNo
17640581LOW-TEMPERATURE DENITRATION CATALYSTMarch 2022May 2025Allow3921NoNo
17639569ZIRCONIUM PHOSPHATE AND SLURRYMarch 2022April 2025Abandon3701NoNo
17638775DENITRATION CATALYST AND DENITRATION METHOD USING THE CATALYSTFebruary 2022January 2026Abandon4631NoNo
17635420Zeolite Syntheses Using Diquaternary Structure Directing AgentsFebruary 2022March 2024Allow2411NoNo
17649983NITRIDE CRYSTAL SUBSTRATE AND METHOD FOR MANUFACTURING THE SAMEFebruary 2022May 2024Allow2821NoNo
17632925METHOD AND APPARATUS FOR PRODUCING SILICON-CONTAINING MATERIALSFebruary 2022August 2025Allow4211NoNo
17630535CHABAZITE SYNTHESIS METHOD INCLUDING ORGANIC AND INORGANIC STRUCTURE DIRECTING AGENTS AND CHABAZITE ZEOLITE WITH FLAKE-LIKE MORPHOLOGYJanuary 2022December 2023Allow2311NoNo
17630541NEW METHOD FOR THE PREPARATION OF A LI-P-S PRODUCT AND CORRESPONDING PRODUCTSJanuary 2022December 2024Allow3501NoNo
17629727METHODS FOR THE RECOVERY OF RARE EARTH ELEMENTSJanuary 2022October 2025Allow4512NoNo
17574830SYSTEMS AND METHODS FOR DRYING COMPOUNDSJanuary 2022November 2023Abandon2221NoNo
17572544METHODS FOR PRODUCING ANHYDROUS HYDROGEN IODIDE (HI)January 2022May 2025Abandon4122NoNo
17572087Rhenium Remediation in the Preparation of Molybdenum-99January 2022March 2025Allow3810NoNo
17626077SILICON-AND GERMANIUM-BASED SCM-25 MOLECULAR SIEVE, PREPARATION PROCESS AND USE THEREOFJanuary 2022February 2024Allow2511NoNo
17567109MONOLITHIC CATALYST AND PREPARATION METHOD AND USE THEREOFDecember 2021June 2022Allow610NoNo
17623521POTASSIUM HEXAFLUOROMANGANATE, AND METHOD FOR PRODUCING MANGANESE-ACTIVATED COMPLEX FLUORIDE FLUORESCENT BODYDecember 2021April 2025Abandon3910NoNo
17552941CHA-TYPE ZEOLITE AND MANUFACTURING METHOD THEREOFDecember 2021February 2024Allow2621YesNo
17618762METHOD FOR PRODUCING HALOGEN OXYACID SOLUTIONDecember 2021August 2025Allow4411YesNo
17617028SHEET-LIKE PARTICLES OF ZEOLITE AND METHOD FOR PRODUCING SAMEDecember 2021October 2023Allow2311NoNo
17616824SUPPORTED OXIDE NH3-SCR CATALYSTS WITH DUAL SITE SURFACE SPECIES AND SYNTHESIS PROCESSESDecember 2021April 2024Allow2911NoNo
17457067JMZ-1, A CHA-CONTAINING ZEOLITE AND METHODS OF PREPARATIONDecember 2021April 2024Abandon2821NoNo
17533772NANO-SULFUR CONTAINING COMPOSITION AND APPLICATION THEREOFNovember 2021November 2023Allow2420NoNo
17466206REACTOR FOR REDUCING NITROGEN OXIDESNovember 2021September 2023Allow2511NoNo
17613321METHOD FOR PRODUCING AEI ZEOLITENovember 2021June 2025Allow4340YesNo
17531242MOLECULAR SIEVE SSZ-117x, ITS SYNTHESIS AND USENovember 2021August 2023Allow2101NoNo
17531228CHABAZITE ZEOLITE SYNTHESIS WITH COMBINED ORGANIC TEMPLATESNovember 2021December 2025Abandon4941YesNo
17595318AMMONIA OXIDATION CATALYST FOR DIESEL APPLICATIONSNovember 2021February 2024Allow2711NoNo
17595035ORGANIC HYDROGEN STORAGE MATERIAL DEHYDROGENATION CATALYST, SUPPORT FOR THE CATALYST, HYDROGEN-STORAGE ALLOY, AND PROCESS FOR PROVIDING HIGH PURITY HYDROGEN GASNovember 2021April 2025Allow4121YesNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner DAVIS, SHENG HAN.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
20
Examiner Affirmed
17
(85.0%)
Examiner Reversed
3
(15.0%)
Reversal Percentile
26.8%
Lower than average

What This Means

With a 15.0% reversal rate, the PTAB affirms the examiner's rejections in the vast majority of cases. This reversal rate is below the USPTO average, indicating that appeals face more challenges here than typical.

Strategic Value of Filing an Appeal

Total Appeal Filings
82
Allowed After Appeal Filing
26
(31.7%)
Not Allowed After Appeal Filing
56
(68.3%)
Filing Benefit Percentile
48.7%
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, 31.7% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is below the USPTO average, suggesting that filing an appeal has limited effectiveness in prompting favorable reconsideration.

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 DAVIS, SHENG HAN - Prosecution Strategy Guide

Executive Summary

Examiner DAVIS, SHENG HAN works in Art Unit 1732 and has examined 961 patent applications in our dataset. With an allowance rate of 64.9%, this examiner has a below-average tendency to allow applications. Applications typically reach final disposition in approximately 33 months.

Allowance Patterns

Examiner DAVIS, SHENG HAN's allowance rate of 64.9% places them in the 25% percentile among all USPTO examiners. This examiner has a below-average tendency to allow applications.

Office Action Patterns

On average, applications examined by DAVIS, SHENG HAN receive 2.48 office actions before reaching final disposition. This places the examiner in the 72% 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 DAVIS, SHENG HAN is 33 months. This places the examiner in the 46% percentile for prosecution speed. Prosecution timelines are slightly slower than average with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +38.3% benefit to allowance rate for applications examined by DAVIS, SHENG HAN. This interview benefit is in the 86% 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, 21.5% of applications are subsequently allowed. This success rate is in the 26% 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 36.7% of cases where such amendments are filed. This entry rate is in the 55% 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, 108.6% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 79% 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 73.0% of appeals filed. This is in the 61% percentile among all examiners. Of these withdrawals, 59.3% occur early in the appeal process (after Notice of Appeal but before Appeal Brief). Strategic Insight: This examiner shows above-average willingness to reconsider rejections during appeals. The mandatory appeal conference (MPEP § 1207.01) provides an opportunity for reconsideration.

Petition Practice

When applicants file petitions regarding this examiner's actions, 76.3% are granted (fully or in part). This grant rate is in the 82% 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 2.2% of allowed cases (in the 76% 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 1.0% of allowed cases (in the 60% 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.
  • 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.