Prosecution Insights
Last updated: May 29, 2026

Examiner: KEYWORTH, PETER

Tech Center 1700 • Art Units: 1777

This examiner grants 58% of resolved cases

Performance Statistics

58.0%
Allow Rate
-7.0% vs TC avg
830
Total Applications
+23.7%
Interview Lift
1287
Avg Prosecution Days
Based on 781 resolved cases, 2023–2026

Rejection Statute Breakdown

0.3%
§101 Eligibility
2.3%
§102 Novelty
86.3%
§103 Obviousness
7.0%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18032366 WASTEWATER TREATMENT SYSTEM USING AMINO ACID FERMENTATION MICROORGANISMS Final Rejection CJ CHEILJEDANG CORPORATION
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
18352385 GUIDING ARRANGEMENT, FLOTATION CELL AND FLOTATION METHOD Final Rejection METSO FINLAND OY
18038265 Water Purification System With Inline Measurement Of Total Organic Carbon And Method Of Operating Such System Non-Final OA Merck Patent 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.
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.
18512890 POROUS COMPOSITE MEMBRANE FORMED BY BLENDING PERFLUOROALKOXY ALKANE (PFA) AND ORGANIC MATERIAL, AND MANUFACTURING METHOD THEREOF Non-Final OA Pukyong National University Industry-University Cooperation Foundation
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
17502032 PERFORMING A SEPARATION ON A FIELD FLOW FRACTIONATOR Final Rejection Wyatt Technology, LLC
18771292 Methods and Systems of Nitrate Removal in Aqueous Systems for Improved PFAS Destruction Final Rejection Claros Technologies Inc.
18508017 FILTRATION SEALING SYSTEM Non-Final OA CUMMINS FILTRATION IP, INC.
17437961 HYDROPHILIC COMPOSITE POROUS MEMBRANE Non-Final OA TEIJIN LIMITED
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
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.
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.
18214754 Continuous Dewatering Recirculation System with Integral Coal Combustion Residual High Flow Plate Separator Final Rejection UNITED CONVEYOR LLC
18323962 SLURRY BASED MIGRANT GAS CAPTURE SYSTEM Final Rejection KNUCO 1, LLC
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
18022986 METHOD FOR SELECTIVELY RECOVERING ARSENIC-CONTAINING COPPER MINERAL, AND FLOTATION AGENT USED IN SAME Non-Final OA Japan Organization for Metals and Energy Security
17917265 REMOVING WATER-SOLUBLE HEAVY METAL-SULFUR COMPLEX FROM PROCESS SOLUTION Final Rejection Tessenderlo Kerley, Inc.

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