MUMBAI, India, Jan. 23 -- Intellectual Property India has published a patent application (202541116626 A) filed by Easwari Engineering College,Chennai, Tamil Nadu, on Nov. 25, 2025, for 'modular downpipe filter with integrated vortex separation and first & nbsp; flush diversion.'
Inventor(s) include Dr. Praveen Kumar Alagesan; Prashanth Sathinapalli; Nishanthini Selvaraj; and Swetha Gopi.
The application for the patent was published on Jan. 23, under issue no. 04/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to the field of rainwater harvesting technology for efficient water filtration, comprising: a main filter housing (101) with an integrated rainwater inlet (102); a vortex generator (103); a separation chamber (104); a removable first-flush collection sump (105); and a clean water outlet (106). The invention focuses on a modular downpipe filter system designed for additive manufacturing (3D printing), which utilizes an integrated design to combine centrifugal (vortex) separation with a static overflow firstflush diversion. This approach meets the demand for high-quality rainwater in urban settings by providing a compact, effective, and reliable alternative to conventional filter systems. The optimized integration of the 3D-printed vortex generator and static weir improves filtration, removing both heavy sediment and dissolved pollutants. The collected clean water can be efficiently harnessed for various non-potable applications."
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