Exhibit 99.1 JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1)(iii) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned each agree that the Schedule 13G to which this exhibit is attached is, and any amendments thereto...Joint Filing Agreement • May 10th, 2006 • Heyman Samuel J • Industrial inorganic chemicals
Pursuant to Rule 13d-1(k)(1)(iii) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned each agree that the Schedule 13G to which this exhibit is attached is, and any amendments thereto filed by any of them will be, filed on behalf of each of them.
