Prosecution Insights
Last updated: April 19, 2026

BEIJING DRAINAGE GROUP CO., LTD

2 pending office actions

Portfolio Summary

2
Total Pending OAs
0
Final Rejections
2
Non-Final OAs

Pending Office Actions

App #TitleExaminerArt UnitStatusFiled
18548274 ELECTROCHEMICAL NITROGEN AND PHOSPHORUS REMOVAL DEVICE AND METHOD BREWSTER, HAYDEN R 1779 Non-Final OA Aug 29, 2023
18004253 Online Model Water Quality Conversion Method and System, Electronic Device, and Medium GEBRESILASSIE, KIBROM K 2189 Non-Final OA Jan 04, 2023

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