198, 200, 201, 202, and 205 and indented subclasses.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles,
411+, for a stock material product in the form of a plural layer web or sheet, but not structurally defined, and which may have a metal layer; and especially subclasses 457+ for such a plural layer product including a metal layer next to a non-metal layer.