(under subclass 2.1) Subject matter in which the envelope is made in whole or in part of conductive material (e.g., metal).
SEE OR SEARCH CLASS
29, Metal Working,
400.1+, for miscellaneous processes of making hollow articles composed in whole or part of metal, subclass.
174, Electricity: Conductors and Insulators,
50.5+, provides for envelopes formed of conductive material which have a lead wire for conducting electricity passing through the wall of the envelope, casing or housing. See especially subclass 50.53 where the metal wall portion is formed as an electrical connector and subclass 50.56 and the subclasses specified in the Notes thereto where the lead wire passes through and is insulated from the metal wall. See section 7 of the class definition for the other subclasses in Class 174 which provide for envelopes, casings, and housings limited by claimed structure to electrical use. 228, Metal Fusion Bonding, appropriate subclasses for making containers by uniting metal to metal, metal to nonmetal, or nonmetal to nonmetal utilizing a metallurgical bond, i.e., a bond in which bond is effected by a metallic cement or by fusion of a metallic part.
403, Joints and Connections,
28+, for a joint between two members which is specially constructed to utilize the thermal characteristics of the members.
