(under subclass 931) Temperature responsive sealing means consisting of two metals having different coefficients of thermal expansion.
SEE OR SEARCH CLASS
428, Stock Materials or Miscellaneous Articles, a residual class for a structurally defined stock material, nonstructural laminate, article of manufacture, or intermediate article of manufacture not provided for elsewhere;
616+, comprising different contiguous layers or portions, each having a matrix or continuous phase of free metal having the property of bending or lengthening in a circular fashion in response to an increase in temperature.
