WASHINGTON — The U.S. Environmental Protection Agency has issued a ban on retail sales of methylene chloride, a common paint stripping ingredient, for household use. Anticipating the move motivated the development of New Generation Stripper by Super Remover, a paint stripper free of the chemical. Granby, Quebec-based Distribution J. Des Serres teamed up with researchers at the University of Massachusetts Lowell to develop the formula. Expected to go into effect in November, the ban does not affect industrial or commercial use of methylene chloride.