Prosecution Insights
Last updated: April 19, 2026

Hach Company

8 pending office actions

Portfolio Summary

8
Total Pending OAs
4
Final Rejections
4
Non-Final OAs

Pending Office Actions

App #TitleExaminerArt UnitStatusFiled
18342216 MITIGATION OF FREE CHLORINE INTERFERENCE FOR OZONE DETECTION USING AN INDIGO-BASED INDICATOR WALLENHORST, MAUREEN 1797 Final Rejection Jun 27, 2023
18151161 POTASSIUM MALEATE BUFFER FOR FREE CHLORINE ANALYSIS ALABI, OYELEYE A 1797 Non-Final OA Jan 06, 2023
18090163 STABILIZED N,N-DIETHYL-P-PHENYLENEDIAMINE SOLUTION AND METHOD FOR DETECTING CHLORINE SIEFKE, SAMUEL P 1758 Final Rejection Dec 28, 2022
18083656 METHODS AND KITS FOR ASSAYING A LARGE FLUID VOLUME USING FLOW CYTOMETRY IANNUZO, NATALIE NMN 1653 Final Rejection Dec 19, 2022
18060181 INDIGO-BASED INDICATOR DETECTION OF OZONE WALLENHORST, MAUREEN 1797 Non-Final OA Nov 30, 2022
17950415 IRON MITIGATION ZINC MEASUREMENT WALLENHORST, MAUREEN 1797 Non-Final OA Sep 22, 2022
17598575 NON-BLEACHING COLORIMETRIC AND FLUOROMETRIC ANALYTE DETECTION BY DEGRADATION OF SOLIDS GERIDO, DWAN A 1797 Final Rejection Sep 27, 2021
16931943 SP3 SUBSTITUTED CARBON ELECTRODE ANALYSIS KOLTONOW, ANDREW ROBERT 1795 Non-Final OA Jul 17, 2020

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