USPTO Examiner BREWSTER HAYDEN R - Art Unit 1779

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
18961927METHOD FOR SIMULTANEOUS CARBON DIOXIDE CAPTURE AND VALORIZATION OF INDUSTRIAL BRINE USING A TWO-STAGE ELECTRODIALYSIS PROCESSNovember 2024October 2025Allow1010NoNo
18738943PASSIVE GRAVITY FILTER CELL TO REDUCE VELOCITY AND METHODS OF USE THEREOFJune 2024June 2025Allow1210YesNo
18233762Water preparation apparatus with a chlorine sensing systemAugust 2023October 2025Allow2610YesNo
18223747Side Stream Treatment for OverflowJuly 2023November 2025Abandon2811NoNo
18223147JUICE SEPARATION APPARATUS WITH SUPPORTED FILTERING DEVICE AND NONPERMEABLE PRESSJuly 2023September 2025Allow2620YesNo
18258840DISCHARGE TECHNOLOGY FOR PLASTIC FILTERSJune 2023January 2026Allow3110YesNo
18338039Passive, Tunable Biocide Delivery SystemJune 2023February 2026Abandon3220NoNo
18267028CLEANING FRAME FOR WASTE GAS PURIFICATION APPARATUSJune 2023January 2026Allow3110NoNo
18333318Portable System For Purification of LiquidsJune 2023February 2026Allow3220YesNo
18321751RECIPROCATING DIAPHRAGM PUMPS FOR BLOOD TREATMENT SYSTEMS AND METHODSMay 2023May 2025Allow2410NoNo
18308130Filter Having a Base and a Support Portion on the BaseApril 2023February 2026Allow3410YesNo
18132398SELF-CLEANING INTAKE FILTERApril 2023March 2026Allow3510NoNo
18189696MEMBRANE DEOXYGENATION WITH ENHANCED STRUCTURAL INTEGRITYMarch 2023February 2026Allow3510NoNo
18028051AUTOMATIC PRIMING OF AN EXTRACORPOREAL BLOOD TREATMENT DEVICE USING A PUSH-PULL METHODMarch 2023January 2025Allow2230NoNo
18121192BLOOD SEPARATION BY MICROFLUIDIC ACOUSTIC FOCUSINGMarch 2023June 2025Allow2711YesNo
18116615INLINE FILTERWELL FLOATING WEIR DISPENSERMarch 2023March 2026Allow3611NoNo
18109671SHOWER FILTER ASSEMBLY FOR ATTRACTING PET TO BATHINGFebruary 2023February 2026Abandon3601NoNo
18020031Improved Filtration MembraneFebruary 2023January 2026Allow3611YesNo
18019069APPARATUS FOR CONTINUOUSLY FILTERING A SLUDGE SUSPENSIONJanuary 2023March 2026Abandon3810NoNo
18007229TREATED WATER PRODUCT OBTAINED WITH USE OF A SYNTHETIC QUARTZ CRYSTALJanuary 2023January 2026Allow3611YesNo
18101263CONVEYOR-BELT FILTERING DEVICE FOR MECHANICALLY CLEANING A LIQUIDJanuary 2023January 2026Allow3611NoNo
18101092METHOD OF CHELATING ANIONS FROM A LIQUID USING A COMPOSITION COMPRISING AT LEAST ONE MACROCYCLIC HOSTING MOIETYJanuary 2023March 2026Allow3711YesNo
18099609ELECTROCHEMICAL CELL WITH COATED SULFONATED GRAPHITE CATHODEJanuary 2023November 2025Allow3310NoNo
18004718FILTERING CONTAINER FOR LIQUIDSJanuary 2023January 2026Allow3610NoNo
18094664APPLICATIONS OF HUMIC ACID IN IMPROVING PHYTOREMEDIATION EFFICIENCY OF HEAVY METALS IN WATERBODYJanuary 2023November 2025Abandon3401NoNo
18013498ROLLER FILTRATION APPARATUSDecember 2022November 2025Abandon3501NoNo
18003090RETAINER FOR FILTERS, AND LEAF DISC FILTER ELEMENTDecember 2022March 2026Allow3821YesNo
18001967DIFFUSION DEVICEDecember 2022March 2026Allow3921YesNo
17925817Rotary filter and associated filtering methodNovember 2022November 2025Allow3611YesNo
18052896METHOD FOR SELECTIVELY REMOVING PERFLUORINATED COMPOUNDS WITH ELECTROOXIDATIONNovember 2022January 2026Allow3811YesNo
17997874FRACTION COLLECTOR, COOLING ARANGEMENT, AND RACK FOR USE THEREWITHNovember 2022October 2025Allow3511NoNo
17996777PREPARATIVE CHROMATOGRAPHY SYSTEM AND METHOD FOR CHROMATOGRAPHY SEPARATIONSOctober 2022August 2025Allow3311NoNo
17968569PROCESS FOR WATER TREATMENT USING IMMERSED GAS TRANSFER MEMBRANESOctober 2022November 2025Allow3721NoNo
17947664METHOD OF USE OF CELLULAR COMPONENT CONCENTRATOR AND FILTER APPARATUSSeptember 2022May 2025Allow3221YesNo
17939945WATER TREATMENT COMPOSITION WITH CATALYTIC MATERIAL AND AN OXIDANT AND METHOD OF USESeptember 2022March 2025Allow3010NoNo
17894665FINE FILTERS AND METHODS FOR MAKING THE SAMEAugust 2022July 2025Allow3421YesNo
17887677SYSTEM FOR PROCESSING MEATS WITH AQUEOUS OZONEAugust 2022January 2023Allow510YesNo
17880940DRAIN VALVEAugust 2022January 2026Allow4121YesNo
17877675Screen-type Screw CentrifugeJuly 2022February 2023Allow610YesNo
17855991ECOLOGICAL SYSTEM FOR DEEP WATER ENVIRONMENT RESTORATION AND CONSTRUCTION METHOD THEREOFJuly 2022August 2025Allow3811NoNo
17852643FILTRATION SYSTEM AND METHOD FOR SYNCHRONIZING PERMEATE AND RETENTATE FLOWJune 2022June 2025Allow3530YesNo
17788057HOLLOW FIBER MEMBRANE TRANSPORT CARTRIDGEJune 2022May 2025Allow3510NoNo
17843409DETERMINATION OF PATIENT BLOOD VOLUME AT START OF A DIALYSIS TREATMENTJune 2022March 2025Abandon3310NoNo
17784307Method for Separating Polyisoprene and Other Apolar Valuable Substances from Vegetable FeedstockJune 2022January 2026Allow4410NoNo
17740967NON-METALLIC SEAL PLATEMay 2022March 2025Allow3520NoNo
17722613WATER CIRCULATION SYSTEM WITH PIPE ASSEMBLY FOR IN-LINE MIXING TO CREATE AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER FOR A RECREATIONAL OR DECORATIVE WATER FEATUREApril 2022June 2022Allow210NoNo
17721846FILTRATION SYSTEM WITH SELECTIVE FLOW REVERSALApril 2022April 2023Allow1231YesNo
17766792RECIPROCATING LAMINATION SPIRAL SOLID-LIQUID SEPARATORApril 2022March 2025Allow3621YesNo
17766830PRODUCTION METHOD OF NON-AQUEOUS ELECTROLYTE SOLUTIONApril 2022June 2025Allow3810YesNo
17713527MULTIFUNCTION BYPASS DISPENSING SYSTEMApril 2022February 2025Allow3520YesNo
17761973Method for Supplying Return Activated SludgeMarch 2022August 2025Allow4121YesNo
17683261MULTI-COMPONENT WEIR CONTROLLED HYDRODYNAMIC SEPARATOR FOR STORMWATER TREATMENTFebruary 2022July 2023Abandon1730NoNo
17677444ULTRA-HIGH TEMPERATURE EXCREMENT SOLID-LIQUID SEPARATION EXTRUSION STERILIZATION INTEGRATED MACHINEFebruary 2022September 2022Allow710YesNo
17672547AIR SCRUBBER SYSTEM WITH PIPE ASSEMBLY FOR IN-LINE MIXING TO CREATE AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATERFebruary 2022April 2022Allow210NoNo
17669472ENHANCING A BIOREFINERY WITH AN OPTIONAL VAPOR RECOMPRESSION UNIT WHILE MAINTAINING THE ABILITY TO OPERATE WITHOUT THE VAPOR RECOMPRESSION UNITFebruary 2022September 2022Allow710YesNo
17621349FEED SIDE SPACER AND SEPARATION MEMBRANE ELEMENTDecember 2021August 2025Allow4440NoNo
17556108HOLLOW FIBER MEMBRANE MODULE AND METHOD OF MAKING AND USING SAMEDecember 2021May 2025Abandon4131NoYes
17556079HOLLOW FIBER MEMBRANE MODULE AND METHOD OF MAKING AND USING SAMEDecember 2021May 2025Abandon4021NoNo
17549693"Super-Bubble" Electro-Photo Hybrid Catalytic System for Advanced Treatment of Organic WastewaterDecember 2021July 2025Allow4321YesNo
17543362MEMBRANES FOR ACID-SENSITIVE SOLVENTSDecember 2021June 2025Allow4231YesNo
17517159REMOVAL SYSTEM INCLUDING REMOVAL AID AND SEPARATING ELEMENTNovember 2021February 2025Allow3911NoNo
17500596SYSTEM AND METHOD FOR TREATING WASTEWATEROctober 2021December 2025Abandon5010NoNo
17602298DIGITAL SEAWATER PROCESSINGOctober 2021July 2025Allow4640YesNo
17496321FLOTATION FILTER WITH INTERNAL GRIDOctober 2021January 2025Allow4020YesNo
17493132METHOD OF DETERMINING AN AMOUNT OF TOTAL CHLORINE IN A WATER SAMPLE FOR HEMODIALYSIS TREATMENTOctober 2021March 2023Allow1710YesNo
17477567SLUDGE TREATMENT SYSTEM USING A HORIZONTAL DRAIN BOARD WITH A MULTI-LAYER GEOTEXTILE BAGSeptember 2021April 2025Allow4321NoNo
17476070TUBULAR MEMBRANE INCLUDING A VORTEX GENERATOR THAT PRODUCES SPIRAL FLUID FLOWSeptember 2021April 2025Allow4330YesNo
17408742TRANSPORTABLE SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER WITH PIPE ASSEMBLY FOR IN-LINE MIXINGAugust 2021December 2021Allow410NoNo
17391152MULTIPLE TAP SYSTEM FOR GENERATING AND DISTRIBUTING AQUEOUS OZONE TO DIFFERENT PIECES OF EQUIPMENTAugust 2021February 2023Allow1810NoNo
17369082Bottle with Filtering ArrangementJuly 2021December 2024Abandon4220NoNo
17323081SORBENT CARTRIDGE DESIGNSMay 2021April 2024Abandon3520YesNo
17292981Spiral Wound Filtration Device And Methods Of ManufactureMay 2021April 2025Allow4731YesNo
17280126POLYURETHANE/POLYVINYLIDENE FLUORIDE COMPOSITE MEMBRANE FOR EXTRACTING ORGANIC SULFIDE FROM NAPHTHA AND PREPARATION METHOD THEREFORMarch 2021August 2022Allow1630NoNo
17196656NANO-BUBBLE GENERATING APPARATUS AND METHODMarch 2021September 2023Allow3030YesNo
17249345REMOVAL OF PHOSPHORUS AND NITROGEN FROM WATERFebruary 2021September 2021Allow711YesNo
17270758ELECTROMAGNETIC IONIC LIQUID AND PREPARATION METHOD THEREFORFebruary 2021February 2022Allow1120YesNo
17181221METHOD OF INDUSTRIAL CENTRIFUGE BASKET PERFORATIONFebruary 2021March 2025Allow4921YesNo
17268486Method Of Operation of a Perfusion SystemFebruary 2021November 2025Allow5731YesNo
17168911SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER WITH PIPE ASSEMBLY FOR IN-LINE MIXINGFebruary 2021July 2021Allow510NoNo
17161173COMBINATION WEARABLE AND STATIONARY DIALYSIS SYSTEMSJanuary 2021April 2025Abandon5021YesNo
17150449SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER WITH MULTI-PATH MANIFOLD FOR MIXING AND DISTRIBUTIONJanuary 2021June 2021Allow510YesNo
17150424MULTI-UNIT SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER WITH MULTI-PATH MANIFOLD FOR MIXING AND DISTRIBUTIONJanuary 2021June 2021Allow510YesNo
17148126PORTABLE SYSTEM FOR WASHING TOOLSJanuary 2021October 2021Abandon911NoNo
17144339PROCESS FOR REMOVING SILICA AND REDUCING TOTAL HARDNESS FROM WATERJanuary 2021May 2025Allow5220YesYes
17116155KIT FOR OPIOID OVERDOSE MONITORINGDecember 2020August 2025Abandon5630YesNo
17112225TANK STERILIZERDecember 2020March 2023Allow2710NoNo
17108775TANGENTIAL FLOW FILTER SYSTEM FOR THE FILTRATION OF MATERIALS FROM BIOLOGIC FLUIDSDecember 2020March 2025Allow5231YesNo
16953536LOGIC FOR CONTROL OF WATER FLOW THROUGH A SCREEN ASSEMBLYNovember 2020May 2023Abandon3010NoNo
17100153ULTRA-HIGH ALKALINE ELECTROLYZED WATER GENERATION SYSTEMNovember 2020July 2023Abandon3210NoNo
17078799PORTABLE DEVICE AND SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATEROctober 2020March 2022Allow1620YesYes
17068207SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER FOR DECONTAMINATION OF A FOOD ANIMAL CARCASSOctober 2020April 2021Allow611YesNo
17012843ALCALIGENES FAECALIS FOR DEGRADING ETHYLENE OXIDESeptember 2020July 2021Allow1021YesNo
17004875FUEL WATER SEPARATOR FILTER WITH AN IMPROVED SEALING ARRANGEMENTAugust 2020June 2022Allow2120YesNo
16816860SYSTEM FOR CREATING AN OXIDATION REDUCTION POTENTIAL (ORP) IN WATER FOR PATHOGENIC CLEANSING AND/OR DEGREASING OF HARD SURFACES AND EQUIPMENTMarch 2020September 2020Allow611YesNo
16645358IN SITU PROCESS FOR PRODUCING LAYERED DOUBLE HYDROXIDE (LDH) AND FURTHER RECYCLING OF THE LDHMarch 2020May 2025Allow6060YesNo
16640453A CARTRIDGE FOR WATER TREATMENT FOR A DEVICE FOR WATER TREATMENT, A HEAD OF A DEVICE FOR WATER TREATMENT AND A DEVICE FOR WATER TREATMENT COMPRISING SUCH A CARTRIDGE AND SUCH A HEADFebruary 2020March 2023Allow3710YesNo
16741348METHODS FOR REMOVAL AND REPLACEMENT OF A FILTER ELEMENT CARTRIDGE INCLUDING AN ATTACHMENT MEMBERJanuary 2020February 2023Allow3710NoNo
16723408AUTOMATED CONTROL MECHANISMS AND METHODS FOR CONTROLLING FLUID FLOW IN A HEMODIALYSIS APPARATUSDecember 2019February 2023Allow3810YesNo
16623735FEED SPACER AND REVERSE OSMOSIS FILTER MODULE INCLUDING SAMEDecember 2019August 2022Allow3220YesNo
16682870SPIRALLY WOUND FILTER ELEMENTS IN ELECTROCHEMICAL DECONTAMINATION CELLSNovember 2019March 2025Allow6070YesNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner BREWSTER, HAYDEN R.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
4
Examiner Affirmed
4
(100.0%)
Examiner Reversed
0
(0.0%)
Reversal Percentile
3.1%
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
48
Allowed After Appeal Filing
12
(25.0%)
Not Allowed After Appeal Filing
36
(75.0%)
Filing Benefit Percentile
34.0%
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, 25.0% 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 BREWSTER, HAYDEN R - Prosecution Strategy Guide

Executive Summary

Examiner BREWSTER, HAYDEN R works in Art Unit 1779 and has examined 437 patent applications in our dataset. With an allowance rate of 53.3%, this examiner allows applications at a lower rate than most examiners at the USPTO. Applications typically reach final disposition in approximately 39 months.

Allowance Patterns

Examiner BREWSTER, HAYDEN R's allowance rate of 53.3% places them in the 15% 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 BREWSTER, HAYDEN R receive 2.44 office actions before reaching final disposition. This places the examiner in the 71% 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 BREWSTER, HAYDEN R is 39 months. This places the examiner in the 26% percentile for prosecution speed. Prosecution timelines are slightly slower than average with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a +59.6% benefit to allowance rate for applications examined by BREWSTER, HAYDEN R. This interview benefit is in the 96% 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, 22.5% of applications are subsequently allowed. This success rate is in the 29% 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 16.2% of cases where such amendments are filed. This entry rate is in the 18% 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, 114.3% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 80% 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 86.2% of appeals filed. This is in the 79% percentile among all examiners. Of these withdrawals, 52.0% 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, 78.4% are granted (fully or in part). This grant rate is in the 83% 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 7% 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 7% 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.
  • 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.
  • 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.