US PATENT SUBCLASS 148 / 902
HAVING PORTIONS OF DIFFERING METALLURGICAL PROPERTIES OR CHARACTERISTICS

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

902HAVING PORTIONS OF DIFFERING METALLURGICAL PROPERTIES OR CHARACTERISTICS {8}
903  DF  .~> Directly treated with high energy electromagnetic waves or particles (e.g., laser, electron beam)
904  DF  .~> Crankshaft
905  DF  .~> Cutting tool
906  DF  .~> Roller bearing element
907  DF  .~> Threaded or headed fastener
908  DF  .~> Spring
909  DF  .~> Tube
910  DF  .~> In pattern discontinuous in two dimensions (e.g., checkerboard pattern)

DEFINITION

Classification: 148/902

Having portions of different metallurgical properties or characteristics:

Art collection pertaining to subclasses 400+ wherein different parts of the metal stock have different metallurgical characteristics, usually as the result of differing Class 148 treatments.

(1) Note. The stock material generally has the same composition throughout as differentiated from stock for Class 428, Stock Material or Miscellaneous Articles which has plural identifiable components, usually of different composition.