0000950131-03-003088 10-K/A 4 20021231 20030523 NANOPHASE TECHNOLOGIES CORPORATION 0000883107 3390 363687863 IL 1231 10-K/A 34 000-22333 03717397 453 COMMERCE ST BURR RIDGE IL 60521 6303231200 453 COMMERCE STREET BURR RIDGE IL 60521 10-K/A 1 d10ka.htm AMENDMENT NO. 1 TO FORM 10-K EX-10.23 3 dex1023.txt COOPERATION AGREEMENT DATED JUNE 23, 2002 EX-99.1 4 dex991.txt CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER EX-99.2 5 dex992.txt CERTIFICATION OF THE ACTING CHIEF FINANCIAL OFFICER