MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202621058662 A) filed by Indian Institute Of Technology Bombay on May 08, 2026, for “ultrafiltration Membranes Coated With Natural Polymer Polyelectrolyte Multilayers For Virus Concentration And Recovery From Wastewater".
Inventors include Swatantra Pratap Singh; and Akhila Manoharan Nair.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: “Ultrafiltration Membranes Coated with Natural Polymer Polyelectrolyte Multilayers for Virus Concentration and Recovery from Wastewater” The present invention discloses a fabrication method and a virus concentration membrane (100) for tangential flow filtration. The membrane (100) includes a polyethersulfone (PES) ultrafiltration membrane (105) and a polyelectrolyte multilayer coating (109) disposed on a feed-facing surface (106) of the PES ultrafiltration membrane (105). The polyelectrolyte multilayer coating (109) comprises alternating anionic carboxymethylcellulose (CMC) layers (107) and cationic chitosan (CHI) layers (108) arranged with a terminal CMC layer (107), thereby increasing hydrophilicity to reduce nonspecific adsorption of virus particles during tangential flow filtration. FIG. 1
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