ROMEOVILLE, Ill., March 31 /PRNewswire-FirstCall/ -- Nanophase Technologies Corporation , a technology leader in nanomaterials and nanoengineered products, noted that the Company has been issued three new foreign patents for Siloxane Star-Graft Polymers, one in each of Great Britain, France, and Germany, which covers one of the Company's fundamental nanoparticle coating technologies.

(Logo: http://www.newscom.com/cgi-bin/prnh/20030422/NANXLOGO )

"Nanophase views its coating technologies as a vital part of the Company's integrated platform of nanomaterial technologies that have been developed over the past four years," stated Dr. Richard Brotzman, Nanophase's vice president of R&D. "Nanophase's platform of commercial nanomaterial technologies currently consists of nanoparticle manufacturing, nanoparticle coating, and nanoparticle dispersion in both aqueous and organic solvents. This particular technology is critical to Nanophase's growth plans in several market areas."

Nanophase Technologies (NANX), http://www.nanophase.com/, provides nanoengineered solutions for multiple industrial product applications. Using a platform of patented and proprietary integrated nanomaterial technologies, the Company creates products with unique performance attributes from two ISO 9001:2000 facilities. Nanophase delivers commercial quantity and quality nanoparticles, coated nanoparticles, and nanoparticle dispersions in a variety of media. The Company owns or licenses 24 United States patents and patent applications and 50 foreign patents and patent applications. Information about Nanophase may be found in the Company's public filings or on its website. Other information on our website is not incorporated by reference into, and not be considered a part of, this press release.

This press release contains words such as "expects", "shall", "will", "believes" and similar expressions that are intended to identify forward- looking statements within the meaning of the Safe Harbor Provisions of the Private Securities Litigation Reform Act of 1995. Such statements in this announcement are made based on the Company's current beliefs, known events and circumstances at the time of publication, and as such, are subject in the future to unforeseen risks and uncertainties that could cause the Company's results of operations, performance and achievements to differ materially from current expectations expressed in, or implied by, these forward-looking statements. These risk and uncertainties include the following: a decision by a customer to cancel a purchase order or supply agreement in light of the Company's dependence on a limited number of key customers; uncertain demand for, and acceptance of, the Company's nanocrystalline materials; the Company's manufacturing capacity and product mix flexibility in light of customer demand; the Company's limited marketing experience; changes in development and distribution relationships; the impact of competitive products and technologies; the Company's dependence on patents and protection of proprietary information; the resolution of litigation in which the Company may become involved; and other risks described in the Company's registration statement on Form 10K filed March 15, 2005 and other filings with the Securities and Exchange Commission. In addition, the Company's forward- looking statements could be affected by general industry and market conditions and growth rates. Except as required by federal securities laws, the Company undertakes no obligation to update or revise these forward-looking statements to reflect new events, uncertainties or other contingencies.

CONTACT: Joseph Cross, President, CEO, +1-630-771-6705, Jess Jankowski,
VP, CFO, +1-630-771-6702, or Nancy Baldwin, Investor Relations,
+1-630-771-6707, all of Nanophase

Web site: http://www.nanophase.com/