(under subclass 331) Apparatus in which the bit or any portion thereof is composed of (1) two or more different materials, (2) a single material which has been treated to provide portions of the bit with specific properties which properties are different from the properties of another portion or (3) a specific material.
(1) Note. The mere recitation under part (3) of metal, iron or steel, per se, is excluded. However, specifying iron and steel or different types of iron or steel would be included under part (1).
(2) Note. The specific material under part (3) may be identified by its properties (e.g., ductile, soft, hardened, etc.).
(3) Note. Under part (1) a rolling cutter element having an insert connected thereto would be included since the cutter element and insert would normally be composed of diverse material.
(4) Note. A bit provided with a welded, brazed or soldered joint is considered formed of diverse material and is classified under this definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
425+, for a nonroller type bit composed of specific or diverse material. SEE OR SEARCH CLASS
76, Metal Tools and Implements, Making,
102, and 108.1+ for processes of making augers and drills usually of specific material.
