Exhibit 4(d) THIRD AMENDMENT AGREEMENT THIS THIRD AMENDMENT AGREEMENT is entered into as of May 18, 2001 A M O N G: ZEMEX CORPORATION, a corporation established under the federal laws of Canada (the "Company"), ZEMEX U.S. CORPORATION, a corporation...Third Amendment Agreement • April 10th, 2002 • Zemex Corp • Mining & quarrying of nonmetallic minerals (no fuels)
Exhibit 4(e) FOURTH AMENDMENT AGREEMENT THIS FOURTH AMENDMENT AGREEMENT is entered into as of December 10, 2001 A M O N G: ZEMEX CORPORATION, a corporation established under the federal laws of Canada (the "Company"), ZEMEX U.S. CORPORATION, a...Fourth Amendment Agreement • April 10th, 2002 • Zemex Corp • Mining & quarrying of nonmetallic minerals (no fuels) • Ontario
