Exhibit 3.20 AMENDED AND RESTATED BUSINESS LOAN AGREEMENT This Amended and Restated Business Loan Agreement dated as of August 31, 1999, is between BANK OF AMERICA, NATIONAL ASSOCIATION (formerly known as Bank of America National Trust and Savings...Business Loan Agreement • March 17th, 2003 • Fuel Tech N V • Industrial & commercial fans & blowers & air purifing equip • Illinois
