Butler County — Middletown and Hamilton — ran on steel and paper: the great Armco (AK Steel) Middletown works, the Champion paper mill, and the Hamilton machine and safe works. Steelmaking and papermaking reportedly relied on asbestos insulation and refractory throughout the century.

Ohio asbestos cases are filed in the Court of Common Pleas of the county of proper venue — there is no single statewide asbestos court, though Cuyahoga County (Cleveland) has historically carried Ohio’s largest asbestos docket. Ohio allows two years from a mesothelioma or asbestos-cancer diagnosis to file (Ohio Rev. Code § 2305.10), and two years from the date of death for a wrongful-death claim (§ 2125.02).