Prosecution Insights
Last updated: April 19, 2026

Examiner: PERRIN, CLARE M

Tech Center 1700 • Art Units: 1654 1777 1778 1779

This examiner grants 67% of resolved cases

Performance Statistics

67.1%
Allow Rate
+2.1% vs TC avg
777
Total Applications
+42.9%
Interview Lift
1073
Avg Prosecution Days
Based on 733 resolved cases, 2023–2026

Rejection Statute Breakdown

0.9%
§101 Eligibility
17.1%
§102 Novelty
41.3%
§103 Obviousness
30.9%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18191380 PRODUCTION OF BARIUM SULFATE FROM SEAWATER Non-Final OA SAUDI ARABIAN OIL COMPANY
18561441 USE OF POLYMERS OF ACRYLIC ACID FOR SCALE INHIBITION IN DESALINATION SYSTEMS Non-Final OA BASF SE
18288047 METHOD FOR THE REGENERATION OF SPECIAL FILTER AIDS FOR THE STABILIZATION OF BEVERAGES Non-Final OA BASF SE
18566217 PARTICLE FILTRATION Non-Final OA UNIVERSITY OF CONNECTICUT
17944698 SOLID, NON-PHOSPHOROUS, SCALE AND CORROSION INHIBITOR COMPOSITION FOR COOLING WATER TREATMENT Non-Final OA Ecolab USA Inc.
17941016 Materials and Methods for Biosorption of Micropollutants from Aqueous Solutions Final Rejection Massachusetts Institute of Technology
17995639 FORMULATIONS AND PROCESSES FOR TREATING WATER FROM IMPACTED SOURCES Non-Final OA Brown University
18576903 Semipermeable Membrane Non-Final OA KANEKA CORPORATION
18249143 IMPROVED FLOCCULANTS Non-Final OA UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
18248196 TAGGING AGENTS, ANTI-SCALANT POLYMER COMPOSITIONS, AND METHODS Non-Final OA Sterling Specialty Chemicals Holding UK Limited
17606231 WATER TREATMENT METHOD AND COMPOSITION Final Rejection DAIKIN INDUSTRIES, LTD.
18204056 SYSTEMS AND METHODS FOR SEPARATING WATER AND REMOVING SOLIDS FROM PRE-TREATED AND UNFILTERED FEEDSTOCK Non-Final OA MARATHON PETROLEUM COMPANY LP
18577434 ADSORPTION METHOD FOR NITRILOTRIACETIC ACID (NTA) REMOVAL FROM EDTA CONTAINING CHELANT SOLUTIONS Non-Final OA Dow Global Technologies LLC
18007853 Metal Chelating Functional Graphene Materials Non-Final OA Carnegie Mellon University
17921697 ADSORBENT, SEPARATION METHOD, AND PRODUCTION METHOD FOR LIQUID Final Rejection DIC Corporation
18539237 METHOD FOR PREPARING LITHIUM EXTRACTION ABSORBENT AND ITS APPLICATION Non-Final OA HARBIN INSTITUTE OF TECHNOLOGY
18153078 HIGH CAPACITY COMPOSITE DEPTH FILTER MEDIA WITH LOW EXTRACTABLES Final Rejection EMD Millipore Corporation
18441779 ION EXCHANGE DEVICES FOR LITHIUM EXTRACTION Non-Final OA Lilac Solutions, Inc.
18026119 IN CHANNEL MAGNETIC RECOVERY Final Rejection Evoqua Water Technologies LLC
18568864 HUANGSHUI POLYSACCHARIDE-BASED HYDROGEL AND PREPARATION METHOD AND USE THEREOF Non-Final OA BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
18556824 SUSTAINABLE DESALINATION SYSTEMS AND METHODS USING RECYCLED BRINE STREAMS Non-Final OA Enviro Water Minerals Company, Inc.
18551944 METHOD OF PRODUCING WATER TREATMENT AGENT FOR SOLVING SILICA SCALE PROBLEM Non-Final OA HIROYUKI KOIKE
18279690 REMOVAL OF ARSENIC, ANTIMONY AND TOXIC METALS FROM CONTAMINATED SUBSTRATE Non-Final OA ENVIT , ENVIRONMENTAL TECHNOLOGIES ENGINEERING LTD.
18241006 METHOD FOR TREATING WASTEWATER CONTAINING TRIAZOLE COMPOUNDS Final Rejection MEGA UNION TECHNOLOGY INC.
18449375 OXYGENATED HIERARCHICALLY POROUS CARBON COMPOUNDS AS SCAFFOLDS FOR METAL NANOPARTICLES Non-Final OA The University of Dayton
18039419 DEVICE FOR BINDING AND SEPARATION OF AT LEAST ONE COMPONENT FROM A BODY FLUID Non-Final OA Alteco Medical AB
18142228 METHOD OF PRODUCING A SOLID METAL CARBONATE HYDRATE Non-Final OA Universität Hamburg
18310905 SORBENT FOR REMOVAL OF IONS FROM LIQUID STREAMS AND METHOD OF MAKING THE SAME Non-Final OA Graver Technologies LLC
18169789 PRILLED LIME COMPOSITIONS, AND ASSOCIATED SYSTEMS AND METHODS Non-Final OA Graymont (NZ) Limited
18151741 HIGH EFFICIENCY SYNTHETIC FILTER MEDIA Final Rejection Knowlton Technologies, LLC

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