(under subclass 341) Filaments and electrodes where the filament or electrode is provided with a coating.
(1) Note. The coating may be either electron emissive or not electron emissive.
(2) Note. This subclass includes only those patents which claim structure of the filament or electrode other than merely reciting that the electrode is a filament, rod cathode, electrode or base, which is provided with a coating.
Where no more is claimed than the mere base with a coating thereon, the patent is classified in one of the classes specified in the class definition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
346, for the structure of other electrodes under subclass 326 which are provided with an electron emissive coating.
355, for the structure of other electrodes under subclass 326 which have a coating thereon. SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles,
554, for a metal particle-containing stock material composite.
