.~.~ Specific or diverse material; or welded, brazed or soldered joint {4}
223
.~.~.~ Coated
DEFINITION
Classification: 92/223
(under subclass 222) Apparatus in which one of the materials is in the form of a thin layer of metal applied to the surface of the end face or skirt-like member of the piston and which forms a unitary part thereof.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles, appropriate subclasses for a stock material product in the form of a plural layer or coated article, and especially
375+, for a coated or bonded rod or strand. Class 428 takes a nominally recited piston having a surface thereof provided with a specific coating. However, a limitation in a claim that the coated surface constitutes a specific part of the piston, such as the head or skirt, for example, is considered a structural limitation and indicates classification in Class 92.
