SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 May 6, 1998 Mallinckrodt Inc. (Exact name of registrant as specified in its charter) New York 1-483 36-1263901 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification No.) 675 McDonnell Boulevard, St. Louis, MO 63134 (Address of principal executive offices) (ZIP Code) Registrant's telephone number, (314) 654-2000 including area code Item 5. Other Events On May 1, 1998, Mallinckrodt Inc. completed the sale of its catalyst business to Engelhard Corporation for $210 million in cash. The sale is part of a plan previously announced by the Company to divest the assets of its specialty chemical business to focus on its global healthcare business. The Company used the net proceeds from the transaction to repay short-term borrowing. Mallinckrodt Inc. ROGER A. KELLER Vice President, Secretary and General Counsel DATE: May 6, 1998