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| Art Unit: | 1779 — Liquid purification or separation |
|---|---|
| Group: | 1770 — Chemical Apparatus, Separation and Purification, Liquid and Gas Contact Apparatus |
| Classes: |
210 — Liquid purification or separation 204 — Chemistry: electrical and wave energy 203 — Distillation: processes, separatory 435 — Chemistry: molecular biology and microbiology 137 — Fluid handling 424 — Drug, bio-affecting and body treating compositions 134 — Cleaning and liquid contact with solids 252 — Compositions 452 — Butchering 604 — Surgery |
| Phone: | (571) 270-1065 |
| Email: | hayden.brewster@uspto.gov |
| Location: | VA 22314 |
| Title: | Pat Examnr Cheml Engrg |
| Service: | 14 years |
| Grade: | GS-14 |
| 3-Year Grant rate: | 64% over 210 cases |
|---|---|
| Difficulty: | Harder |
| Difficulty Percentile: | 68th
|
With Examiner Brewster, you have a 64% chance of getting an issued patent by 3 years after the first office action. Examiner Brewster is a harder examiner and in the 68th percentile across all examiners (with 100th percentile most difficult).
Below is the grant rate timeline for Examiner Brewster, where the timeline is relative to the date of the first office action. The three-year grant rate is the percentage of applications granted at three years after the first office action.
Examiner Brewster's grant rate is lower than that of Art Unit 1779 and lower than that of the USPTO.
| Average Office Actions Per Grant | |
|---|---|
| Examiner Brewster | 1.9 |
| Art Unit 1779 | 1.8 |
Examiner Brewster has granted 89 of 149 cases without any applicant-requested interviews for a grant rate of 60%.
Examiner Brewster has granted 46 of 61 cases with at least one applicant-requested interview for a grant rate of 75%.
With Examiner Brewster, conducting an interview increases your chance of getting a patent granted by 25%.
| Number | Title | OA Rejections | Status | IFW |
|---|---|---|---|---|
| 17784307 | Method For Separating Polyisoprene And Other Apolar Valuable Substances From Vegetable Feedstock | Rejection information available with a Premium Stats subscription. See our pricing. | Patented | View |
| 18019069 | Apparatus For Continuously Filtering A Sludge Suspension | Abandoned | View | |
| 18004718 | Filtering Container For Liquids | Patented | View | |
| 17925817 | Rotary Filter And Associated Filtering Method | Patented | View | |
| 17968569 | Process For Water Treatment Using Immersed Gas Transfer Membranes | Patented | View | |
| 17268486 | Method Of Operation Of A Perfusion System | Patented | View | |
| 18109671 | Shower Filter Assembly For Attracting Pet To Bathing | Abandoned | View | |
| 18338039 | Passive, Tunable Biocide Delivery System | Abandoned | View | |
| 18233762 | Water Preparation Apparatus With A Chlorine Sensing System | Patented | View | |
| 17997874 | Fraction Collector, Cooling Arangement, And Rack For Use Therewith | Patented | View | |
| 17549693 | "super-Bubble" Electro-Photo Hybrid Catalytic System For Advanced Treatment Of Organic Wastewater | Patented | View | |
| 18961927 | Method For Simultaneous Carbon Dioxide Capture And Valorization Of Industrial Brine Using A Two-Stage Electrodialysis Process | Patented | View | |
| 18099609 | Electrochemical Cell With Coated Sulfonated Graphite Cathode | Patented | View | |
| 17543362 | Membranes For Acid-Sensitive Solvents | Patented | View | |
| 17761973 | Method For Supplying Return Activated Sludge | Patented | View | |
| 17855991 | Ecological System For Deep Water Environment Restoration And Construction Method Thereof | Patented | View | |
| 17500596 | System And Method For Treating Wastewater | Abandoned | View | |
| 18223147 | Juice Separation Apparatus With Supported Filtering Device And Nonpermeable Press | Patented | View | |
| 18223747 | Side Stream Treatment For Overflow | Abandoned | View | |
| 17996777 | Preparative Chromatography System And Method For Chromatography Separations | Patented | View | |
| 17196656 | Nano-Bubble Generating Apparatus And Method | Patented | View | |
| 18094664 | Applications Of Humic Acid In Improving Phytoremediation Efficiency Of Heavy Metals In Waterbody | Abandoned | View | |
| 18013498 | Roller Filtration Apparatus | Abandoned | View | |
| 17602298 | Digital Seawater Processing | Patented | View | |
| 17894665 | Fine Filters And Methods For Making The Same | Patented | View | |
| 18121192 | Blood Separation By Microfluidic Acoustic Focusing | Patented | View | |
| 18738943 | Passive Gravity Filter Cell To Reduce Velocity And Methods Of Use Thereof | Patented | View | |
| 17852643 | Filtration System And Method For Synchronizing Permeate And Retentate Flow | Patented | View | |
| 17621349 | Feed Side Spacer And Separation Membrane Element | Patented | View | |
| 16339396 | Device And Method For Water Filtration Using Discarded Dialyzers | Patented | View | |
| 18321751 | Reciprocating Diaphragm Pumps For Blood Treatment Systems And Methods | Patented | View | |
| 17788057 | Hollow Fiber Membrane Transport Cartridge | Patented | View | |
| 17144339 | Process For Removing Silica And Reducing Total Hardness From Water | Patented | View | |
| 17477567 | Sludge Treatment System Using A Horizontal Drain Board With A Multi-Layer Geotextile Bag | Patented | View | |
| 17323081 | Sorbent Cartridge Designs | Patented | View | |
| 16645358 | In Situ Process For Producing Layered Double Hydroxide (Ldh) And Further Recycling Of The Ldh | Patented | View | |
| 17116155 | Kit For Opioid Overdose Monitoring | Abandoned | View | |
| 17683261 | Multi-Component Weir Controlled Hydrodynamic Separator For Stormwater Treatment | Patented | View | |
| 17766830 | Production Method Of Non-Aqueous Electrolyte Solution | Patented | View | |
| 17369082 | Bottle With Filtering Arrangement | Patented | View | |
| 17766792 | Reciprocating Lamination Spiral Solid-Liquid Separator | Patented | View | |
| 17740967 | Non-Metallic Seal Plate | Patented | View | |
| 16244275 | Systems And Methods For Cleaning Water Filtration Systems | Patented | View | |
| 17476070 | Tubular Membrane Including A Vortex Generator That Produces Spiral Fluid Flow | Patented | View | |
| 17108775 | Tangential Flow Filter System For The Filtration Of Materials From Biologic Fluids | Patented | View | |
| 16184048 | Method Of Treatment Of Water Effluent With Multilayer Filter Under Electric Current | Patented | View | |
| 17181221 | Method Of Industrial Centrifuge Basket Perforation | Patented | View | |
| 17292981 | Spiral Wound Filtration Device And Methods Of Manufacture | Patented | View | |
| 17947664 | Method Of Use Of Cellular Component Concentrator And Filter Apparatus | Patented | View | |
| 17517159 | Removal System Including Removal Aid And Separating Element | Patented | View |
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