ALEXANDRIA, Va., July 30 -- United States Patent no. 12,370,473, issued on July 29, was assigned to DEWLINK SLUDGE TREATMENT LTD (Shropshire, Great Britain).

"Reciprocating lamination spiral solid-liquid separator" was invented by Kwan Hao Chan (Shropshire, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A reciprocating lamination spiral solid-liquid separator is provided, including: a support frame, a filter chamber, a spiral shaft and a driving device. The filter chamber is assembled with the support frame. The spiral shaft is mounted on the support frame and passes through the filter chamber. The driving device is mounted on the support frame. Two ends of the filter chamber respectively have ...