ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,736, issued on March 18, was assigned to STI Co. Ltd. (Anseong-si, South Korea).

"Pod cleaning process" was invented by Young Soo Park (Anseong-si, South Korea), Dong Geun Hur (Anseong-si, South Korea) and Ki Man Lee (Anseong-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Proposed is a POD cleaning process including: separating an introduced POD into an inner POD and an outer POD; cleaning a separation POD, which results from the separation, within a cleaning sub-chamber; drying the separation POD, which undergoes the cleaning, within a drying chamber; vacuum-processing the separation POD undergoing the drying; and assembling the in...