(under subclass 480) Product in which some of the acid and/or the alcohol moieties, from which the polyester is derived, are at least trifunctional, permitting a cross-linking of the linear polyester chain.
(1) Note. A patent claiming a laminate comprising a polyester layer derived from an acid which is at least tribasic or an alcohol which is at least trihydric or in which either the poly basic acid or polyhydric alcohol is unsaturated, will be placed here.
