Complex sentence: Henson owned the trademarks to the Muppet characters: he was reluctant to market them at first, but agreed when the CTW promised that the profits from toys, books, and other products were to be used exclusively to fund the CTW.
Split into simpler sentences: Henson owned the trademarks to the Muppet characters, and he was reluctant to market them at first. He agreed when the CTW promised that the profits from toys, books, and other products were to be used exclusively to fund the CTW.