Prosecution Insights
Last updated: April 19, 2026

Hach Company - Oliff PLC

17 pending office actions • 5 clients

Portfolio Summary

17
Total Pending OAs
5
Final Rejections
12
Non-Final OAs

Client Portfolio (5 clients)

Client (Assignee)Pending OAs
Chemtreat, Inc. 10
Hach Company 3
Trojan Technologies Group Ulc 2
Ott Hydromet Corp. 1
U.S. Peroxide, LLC 1

Pending Office Actions

App #TitleClientExaminerArt UnitStatusFiled
18917286 METHODS OF PROTECTING FURNACE ELECTRODES WITH COOLING LIQUID THAT CONTAINS AN ADDITIVE Chemtreat, Inc. TALBOT, BRIAN K 1712 Non-Final OA Oct 16, 2024
18615007 COMPOSITIONS AND METHODS OF TREATING METAL SURFACES IN SURFACE PREPARATION PROCESSES Chemtreat, Inc. BAREFORD, KATHERINE A 1718 Non-Final OA Mar 25, 2024
18584647 ITERATIVE PROMPT TRAINER AND REPORT GENERATOR Chemtreat, Inc. UDDIN, MD I 2169 Non-Final OA Feb 22, 2024
18422226 UV RADIATION APPARATUS FOR TREATING FLUIDS Trojan Technologies Group Ulc GONZALEZ, MADELINE 1773 Non-Final OA Jan 25, 2024
18522985 METHODS FOR RECOVERING FLY ASH USING A SELECTIVE FLOCCULANT Chemtreat, Inc. JEONG, YOUNGSUL 1772 Non-Final OA Nov 29, 2023
18388361 DISINFECTION REACTOR WITH SPIRAL FLOW Trojan Technologies Group Ulc GONZALEZ, MADELINE 1773 Non-Final OA Nov 09, 2023
18381397 METHOD FOR INHIBITING CORROSION USING AQUEOUS DISPERSION OF ALKYL BIS AMIDE Chemtreat, Inc. DIGGS, TANISHA 1761 Non-Final OA Oct 18, 2023
18235992 NON-TRIAZOLE COMPOUNDS AND METHODS FOR INHIBITING CORROSION USING NON-TRIAZOLE COMPOUNDS Chemtreat, Inc. ANTHONY, JOSEPH DAVID 1764 Non-Final OA Aug 21, 2023
18216754 METEOROLOGICAL EVENT DETECTION USING GRADIENT DESCENT METHOD Ott Hydromet Corp. VON WALD, ERIC S 2857 Final Rejection Jun 30, 2023
18199548 INTEGRATED THERMAL HYDROLYSIS AND VACUUM DIGESTION FOR TREATING FLUID USING A BIOCHEMICAL PROCESS U.S. Peroxide, LLC MILLER-CRUZ, EKANDRA S. 1773 Non-Final OA May 19, 2023
18151161 POTASSIUM MALEATE BUFFER FOR FREE CHLORINE ANALYSIS Hach Company ALABI, OYELEYE A 1797 Non-Final OA Jan 06, 2023
18090163 STABILIZED N,N-DIETHYL-P-PHENYLENEDIAMINE SOLUTION AND METHOD FOR DETECTING CHLORINE Hach Company SIEFKE, SAMUEL P 1758 Final Rejection Dec 28, 2022
18083656 METHODS AND KITS FOR ASSAYING A LARGE FLUID VOLUME USING FLOW CYTOMETRY Hach Company IANNUZO, NATALIE NMN 1653 Final Rejection Dec 19, 2022
18076964 FLUORESCENCE DETECTION OF SULFITE IN WATER TREATMENT APPLICATIONS Chemtreat, Inc. GERMAIN, ADAM ADRIEN 1777 Non-Final OA Dec 07, 2022
17961180 METHODS OF TREATING ADIABATIC COOLING MEDIA IN EVAPORATIVE COOLING SYSTEMS Chemtreat, Inc. STANLEY, JANE L 1767 Final Rejection Oct 06, 2022
17673987 METHODS AND SYSTEMS FOR EVALUATING ORGANIC CONTAMINANTS IN WATER Chemtreat, Inc. FRITCHMAN, REBECCA M 1758 Final Rejection Feb 17, 2022
17138073 CORROSION CONTROL OF STAINLESS STEELS IN WATER SYSTEMS USING TIN CORROSION INHIBITOR WITH A HYDROXYCARBOXYLIC ACID Chemtreat, Inc. GOLOBOY, JAMES C 1771 Non-Final OA Dec 30, 2020

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