ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,370, issued on Feb. 17, was assigned to KOMATSU LTD. (Tokyo).

"Hydrocarbon deposition amount estimation device, hydrocarbon deposition amount estimation method, control device, and exhaust gas purification system" was invented by Mitsuyoshi Kimura (Tokyo) and Yutaka Ono (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "This hydrocarbon deposition amount estimation device comprises a hydrocarbon deposition amount estimation unit that estimates the deposition amount of hydrocarbons deposited in an exhaust gas purification device of an internal combustion engine equipped with an oxidation catalyst on the basis of at least a first measured value cor...