FORMING OR TREATING MATERIAL USEFUL IN A CAPACITOR:
(under the class definition) Process wherein etching is used in the forming or treating of materials that may be used in a device composed of two conductors separated by a dielectric capable of storing electrical energy blocking the flow of direct current to a degree dependent upon the capacitance and the frequency.
SEE OR SEARCH CLASS
29, Metal Working, for making special articles as defined in the etching class definition, note
25.03, for electrolytic device making, e.g., capacitor, etc., and subclasses 25.41+ for electric condenser making.
174, Electricity: Conductors and Insulators,
143, for bushing-type condenser.
361, Electricity: Electrical Systems and Devices,
268+, for induction apparatus combined with electrical capacitors, subclasses 271+ for electrostatic capacitors, subclasses 277+ for variable-type electrical capacitors, and subclasses 500+ for electrolytic-type condensers.