Prosecution Insights
Last updated: April 19, 2026

Examiner: KEYWORTH, PETER

Tech Center 1700 • Art Units: 1777

This examiner grants 58% of resolved cases

Performance Statistics

57.7%
Allow Rate
-7.3% vs TC avg
822
Total Applications
+23.9%
Interview Lift
1264
Avg Prosecution Days
Based on 775 resolved cases, 2023–2026

Rejection Statute Breakdown

0.9%
§101 Eligibility
14.9%
§102 Novelty
50.9%
§103 Obviousness
28.5%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18771292 Methods and Systems of Nitrate Removal in Aqueous Systems for Improved PFAS Destruction Final Rejection Claros Technologies Inc.
18347015 CONTINUOUS CASTING SPRAY WATER PERFORMANCE MONITORING AND WATER CONTROL CHEMISTRY Non-Final OA Ecolab USA Inc.
16839174 CLEAN-IN-PLACE USING ULTRASOFT WATER Final Rejection Ecolab USA Inc.
19251298 SYSTEMS AND METHODS FOR WATER FILTRATION Non-Final OA YESONE CORPORATION dba WATERIA
18514208 Filter for a Fluid Passageway Non-Final OA Robert Bosch GmbH
17824116 DIRECT SOLVENT CONTACT CRYSTALLIZATION ZERO-LIQUID DISCHARGE DESALINATION WITH VOLATILE HYDROPHOBIC RECOVERY AGENT REGENERATION Non-Final OA TexOPCO, LLC
19054835 THE CONTROL OF CONTINUOUS WATER TREATMENT Non-Final OA THE WATER & CARBON GROUP PTY. LTD.
17870251 SLURRY RECYCLING FOR CHEMICAL MECHANICAL POLISHING SYSTEM Non-Final OA Taiwan Semiconductor Manufacturing Co., Ltd.
18029955 PURE WATER PRODUCTION SYSTEM AND PURE WATER PRODUCTION METHOD Final Rejection ORGANO CORPORATION
18018291 APPARATUS AND METHOD FOR PRODUCING PURE WATER Final Rejection ORGANO CORPORATION
18289373 HOLLOW-FIBRE MEMBRANE FILTER HAVING IMPROVED SEPARATION PROPERTIES Non-Final OA FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
18032366 WASTEWATER TREATMENT SYSTEM USING AMINO ACID FERMENTATION MICROORGANISMS Final Rejection CJ CHEILJEDANG CORPORATION
17909986 METHOD FOR REDUCING CORROSION FATIGUE OF EVAPORATING TUBE IN BOILER Non-Final OA KURITA WATER INDUSTRIES LTD.
17502032 PERFORMING A SEPARATION ON A FIELD FLOW FRACTIONATOR Non-Final OA Wyatt Technology, LLC
17437961 HYDROPHILIC COMPOSITE POROUS MEMBRANE Non-Final OA TEIJIN LIMITED
18553453 PLANT AND PROCESS FOR REMOVING SUSPENDED SOLIDS, OILS AND GREASES FROM COOLING WATER IN THE STEEL AND METALLURGICAL SECTOR Non-Final OA DANIELI & C. OFFICINE MECCANICHE S.P.A.
18600473 SYSTEMS AND METHODS FOR DESALINATION OF LIQUIDS Final Rejection ACQUOLINA IL MONDO, LLC
18031552 FLOTATION CELL VORTEX STABILIZER Non-Final OA FLSmidth A/S
18408853 Treatment of Liquid Streams Containing High Concentrations of Solids Using Ballasted Clarification Non-Final OA Evoqua Water Technologies LLC
18563345 PERFLUOROALKYL COMPOUND-ADSORBING ACTIVATED CARBON Non-Final OA Futamura Kagaku Kabushiki Kaisha
17772751 HIGH-RATE SETTLING CLARIFIER WITH INCREASED TURN DOWN CAPABILITIES Non-Final OA SUEZ INTERNATIONAL
18496275 WATER FILTER ELEMENT HAVING A REMOVAL AND REPLACEMENT MEMBER Non-Final OA Qingdao Ecopure Filter Co., Ltd.
18456916 METHOD AND DEVICE FOR REMOVING SEDIMENTS FROM WATER. Non-Final OA ASDR Canada Inc.
18115410 Method and System for Processing a Fluid Non-Final OA Economy AGT Fluid Management Systems, LLC
18023234 METHOD AND SYSTEM FOR PROCESSING OF BIOLOGICAL WASTE Non-Final OA SCANSHIP HOLDING ASA
16339216 CLASSIFICATION PARTICLE SIZE DISTRIBUTION MODIFICATION TECHNIQUE BASED ON HYDROPHOBIC MEDIA FOR ENHANCED FLUIDIZED BED FLOTATION SEPARATION Non-Final OA CiDRA Corporate Services LLC
17917265 REMOVING WATER-SOLUBLE HEAVY METAL-SULFUR COMPLEX FROM PROCESS SOLUTION Final Rejection Tessenderlo Kerley, Inc.
17725393 LIQUID-LIQUID EXTRACTION OF HYDROCARBONS IN BULK STORAGE TANKS Non-Final OA MACQUARIE COMMODITIES TRADING US, LLC

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