.~.~.~> With natural rubber next to second layer of natural rubber
DEFINITION
Classification: 428/465
(under subclass 457) Product in which a layer adjacent the metal layer contains natural rubber*.
(1) Note. Synthetic rubber is usually derived from polymerized dienes and acrylonitriles and patents claiming these in a metal laminate are collected in subclasses 462 or 463. Patents claiming metal next to polysulfide synthetic rubber are collected in subclass 419.
SEE OR SEARCH THIS CLASS, SUBCLASS:
419, for metal next to sulfide (Thiokol) rubber; and see (1) Note above.
462, for metal next to chloroprene, neoprene, Buna S* or G. R. S.* rubber; and see (1) Note above.
463, for metal next to acrylonitrile rubber; and see (1) Note above.
