(under the class definition) Subject matter relating to an electrostatic capacitor which is an electrical device having the property that permits energy storage as a result of electron displacement, usually consisting of at least two conducting surfaces separated by a nonconducting medium (i.e., dielectric) such as a gas, liquid or solid or some combinations thereof.
(1) Note. The term condenser generally used in older patents is an old term synonymous with the term capacitor. The same comment applies to armature and electrode.
(2) Note. This subclass includes electrostatic capacitors, per se. Electrostatic capacitors combined with another art device or system are classified with the particular art device or system.
SEE OR SEARCH THIS CLASS, SUBCLASS:
433+, for electrolytic capacitors.
SEE OR SEARCH CLASS
29, Metal Working,
25.41+, for miscellaneous methods of manufacturing capacitors. Also consult the extensive search notes to subclass 25.41 for a compilation of related art. 216, Etching a Substrate: Processes,
6, for etching in the manufacturing of a capacitor.
307, Electrical Transmission or Interconnection Systems,
400, for electrets, per se, and electret systems. An electret is a permanently polarized dielectric, and therefore related to a capacitor, which has a transiently polarized dielectric.
314, Electric Lamp and Discharge Devices: Consumable Electrodes,
132, for arc lamps combined with any capacitor.
315, Electric Lamp and Discharge Devices: Systems,
3+, and 32+ for cathode-ray tubes, electric lamps or gas discharge devices combined with as an integral part of their structure, a capacitor.
333, Wave Transmission Lines and Networks, appropriate subclasses for miscellaneous communication type electrical networks having capacitors as part thereof.
334, Tuners, appropriate subclasses for a variable tuner comprising an inductor and a capacitor, with the inductor or capacitor being variable for changing the mean resonant frequency of the circuit.
341, Coded Data Generation or Conversation, 15, for capacitive pattern reading type analog to digital converters.
