Koppartrans originated in 1947 as an oil and gas venture between Stora Kopparbergs and Rederi A/B Transatlantic, apparently through Rederi A/B Transoil, creating oil and shipping companies. Shell acquired half in 1958 and the rest around 1963–1964 or the mid-1960s. The brand disappeared by the early 1970s.
Keep the explicit scope label independent; no alias or company identity is inferred.