Imagine how tough it would be to be responsible for marketing a “disappearing” product. That’s the challenge faced by a group of marketers at DuPont, a company with a portfolio of brands that, for the most part, reach final consumers only as ingredients in finished products. Teflon non-stick coating, Lycra fibers, Freon refrigerant, Kevlar bullet-resistant fabric, Stainmaster carpet—these well-known DuPont products share the distinction of being used in the manufacture of products that ultimately bear some other company’s brand