PATERSON, N.J. -- Ultra Additives, a supplier of foam-control agents, is marking its 50th year of operation in 2002. The company was launched in 1952 by John D'Amico and Malachi Zecchin as Ultra Manufacturing, a producer of water-based paints that toll-manufactured products for regional and national paint companies. The company evolved into a supplier of intermediate chemicals and additives in the 1980s, and was acquired in 2000 by M¿nzing Chemie GmbH of Germany.