ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,700, issued on Feb. 10, was assigned to Johnson Matthey PLC (London).
"Treatment of particulate filters" was invented by Thomas Hotchkiss (Royston, Great Britain), Jordan Nisbet (Royston, Great Britain) and Craig Thomson (Royston, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method and apparatus for applying a dry powder to a porous substrate (10) comprising: a) locating the porous substrate (10) in a holder (2) such that an inlet face (11) is in communication with an inlet chamber (15) and an outlet face (12) is in communication with a vacuum generator; b) establishing a primary gas flow through the porous substrate (10) using the...