US Patent Issued to UPM-KYMMENE on Dec. 30 for "Method and arrangement for feedback based control in chemical refining of wood" (Finnish Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,736, issued on Dec. 30, was assigned to UPM-KYMMENE Corp. (Helsinki).

"Method and arrangement for feedback based control in chemical refining of wood" was invented by Sami Turunen (Lappeenranta, Finland), Mika Laitila (Hameenlinna, Finland) and Juha Tamper (Levanen, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "Method and control system are provided for controlling values of process parameters of a pretreatment process of wood particles. A sampler is used to obtain a sample of a product flow of said pretreatment process after said wood particles have undergone steam explosion in a hemihydrolysis reactor. A particle measurement device is use...