US Patent Issued to Johnson Matthey on July 28 for "Treatment of particulate filters" (British Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,807, issued on July 28, was assigned to Johnson Matthey PLC (London).

"Treatment of particulate filters" was invented by Sabina Burmester (Royston, Great Britain), Thomas Hotchkiss (Royston, Great Britain), David Marvell (Royston, Great Britain) and John Turner (Royston, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and apparatus (1) for treating a filter (2) for filtering particulate matter from exhaust gas. A reservoir (3) containing a dry powder (4) is provided. A vacuum generator (6) establishes a primary gas flow through a porous structure of the filter (2) by applying a pressure reduction to an outlet face of the filter...