0000950131-03-002172 8-K 2 20030411 7 9 20030418 NANOPHASE TECHNOLOGIES CORPORATION 0000883107 3390 363687863 IL 1231 8-K 34 000-22333 03655408 453 COMMERCE ST BURR RIDGE IL 60521 6303231200 453 COMMERCE STREET BURR RIDGE IL 60521 8-K 1 d8k.htm FORM 8-K EX-99.1 3 dex991.htm PRESS RELEASE DATED APRIL 11, 2003