ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,371, issued on May 26.
"Method and device for capturing and disinfecting contaminants for drainage system" was invented by Wing Han Ching (Hong Kong, Hong Kong).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for removing contaminants from exhaust air and liquid using a disinfection device comprising a housing having a chamber and a top end. The chamber has a body and a reducing part. The reducing part comprises a first opening at the bottom end of the chamber and a floating body configured to seal the first opening at the bottom end. The disinfection device further comprises a spiral guiding channel having an inlet and an outlet connecting to...