ALEXANDRIA, Va., Jan. 27 -- A. Schulman Inc., Fairlawn, Ohio, has been assigned a patent (9,873,772) developed by two co-inventors for polymer foams. The co-inventors are Juan Antonio Igualada, Castellon, Spain, and Jose Luis Feijoo, Villarreal, Spain. The abstract states: "Monomodal foamed polymeric compositions containing clay nucleating agents are described. The clays are preferably sepiolite, palygorskite/attapulgite, or combinations thereof. Also described are processes for forming the foam . . .