1 EXHIBIT 4.3.20 THIS WARRANT AND THE UNDERLYING SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY OTHER SECURITIES LAWS, HAVE BEEN TAKEN FOR INVESTMENT, AND MAY NOT BE SOLD OR TRANSFERRED...Warrant Agreement • February 14th, 2001 • Probex Corp • Blank checks • Delaware
CLASS "AG" WARRANT TO PURCHASE SHARES OF COMMON STOCK OF PROBEX CORP. (A DELAWARE CORPORATION)Warrant Agreement • February 14th, 2001 • Probex Corp • Blank checks
CLASS "AD" WARRANT TO PURCHASE SHARES OF COMMON STOCK OF PROBEX CORP. (A DELAWARE CORPORATION)Warrant Agreement • February 14th, 2001 • Probex Corp • Blank checks
CLASS "AA" WARRANT TO PURCHASE SHARES OF COMMON STOCK OF PROBEX CORP. (A DELAWARE CORPORATION)Warrant Agreement • February 14th, 2001 • Probex Corp • Blank checks • Texas
1 EXHIBIT 10.23 [CREDIT SUISSE FIRST BOSTON CORPORATION LETTERHEAD] October 11,2000 Mr. Charles M. Rampacek STEVEN S. GREENWALD Chief Executive Officer & President Managing Director Probex Corp. One Galleria Tower 13355 Noel Road Suite 1200 Dallas, TX...Engagement Agreement • February 14th, 2001 • Probex Corp • Blank checks
