Subject matter under subclasses 301.1+ wherein the dielectric is a vacuum, or gas (e.g., compressed air).
(1) Note. Excluded here are gas impregnants which are found in subclasses 314+.
(2) Note. This subclass is exclusively for fixed capacitors as defined in subclasses 301.1+ with gas dielectric. Usually the gas capacitor is in a sealed housing.
(3) Note. Gas by definition includes mixtures of gas including the ambient air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
279, for variable capacitors with gas or vacuum dielectrics.
SEE OR SEARCH CLASS
216, Etching a Substrate: Processes, 6, for etching in the manufacturing of a capacitor.
