▁manufact uring ▁company ▁in ▁Chicago . ▁He ▁quickly ▁learned ▁the ▁process ▁of ▁comb ust ion ▁and ▁was ▁thought ▁to ▁have ▁contributed ▁heavily ▁in ▁the ▁designs ▁of ▁new ▁inc iner ators , ▁but ▁was ▁never ▁cred ited ▁for ▁his ▁work . ▁For ▁that ▁reason , ▁he ▁left ▁to ▁purs ue ▁his ▁own ▁interests . ▁ ▁Ac com pl ish ments ▁ ▁He ▁later ▁created ▁a ▁smaller ▁domestic ▁version ▁and ▁a ▁larger ▁mobile ▁version ▁of ▁the ▁air ▁pur ification ▁device ▁to ▁show ▁its ▁vers at ility . ▁This ▁device ▁further ▁reduced ▁the ▁ash ▁em issions ▁of ▁the ▁furn ace ▁and ▁power ▁plant ▁sm ok est ack ▁em issions . ▁Moreover , ▁it ▁was ▁not ▁limited ▁by ▁design ▁and ▁configuration , ▁meaning ▁that ▁its ▁efficiency ▁remained ▁excellent ▁regardless ▁of ▁industrial ▁or ▁resident ial ▁applications . ▁This ▁was ▁not ▁true ▁of ▁typical ▁air ▁poll ution ▁control ▁techn ologies , ▁such ▁as ▁electro static ▁precip it ators , ▁bag ▁houses , ▁and ▁wet ▁scr ub bers . ▁ ▁The ▁larger ▁the ▁device ▁that ▁util ized ▁these ▁approaches , ▁the ▁more ▁cum bers ome ▁and ▁in efficient ▁it ▁became . ▁ ▁The ▁core ▁of ▁Sto kes ' ▁technology ▁was ▁a ▁unique ▁util ization ▁of ▁what ▁he ▁described ▁as ▁" the ▁three ▁T ’ s ": ▁Tem per ature , ▁Time ▁and ▁Tur bul ence . ▁ ▁In ▁his ▁pat ent ▁applications ▁( U . S ., ▁U . K ., ▁Germany , ▁and ▁Japan ), ▁he ▁provided ▁only ▁data ▁sufficient ▁to ▁obtain ▁pat ent ▁appro val . ▁Other ▁critical