EXHIBIT 4.1 REGISTRATION RIGHTS AGREEMENT Dated as of December 4, 200l by and among Lyondell Chemical Company ARCO Chemical Technology, Inc. ARCO Chemical Technology, L.P. Lyondell Chemical Nederland, Ltd.Registration Rights Agreement • January 10th, 2002 • Lyondell Chemical Nederland LTD • Petroleum refining • New York
Contract Type FiledJanuary 10th, 2002 Company Industry Jurisdiction
andSupplemental Indenture • January 10th, 2002 • Lyondell Chemical Nederland LTD • Petroleum refining • New York
Contract Type FiledJanuary 10th, 2002 Company Industry Jurisdiction
EXHIBIT 3.8 ARCO CHEMICAL TECHNOLOGY, L.P. AGREEMENT OF LIMITED PARTNERSHIPLyondell Chemical Nederland LTD • January 10th, 2002 • Petroleum refining • Delaware
Company FiledJanuary 10th, 2002 Industry Jurisdiction