(under subclass 567) Subject matter wherein the composition of an electrode is significantly recited.
(1) Note. See the class definition for a discussion of patents disclosing electrode compositions or materials for use in gas or vapor lamps or discharge devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
311, for a discharge device having an electrode of particular material. Also, see the subclasses specified in the notes for discharge devices having an electrode defined by composition or material.
558, for an electrode which includes a getter or is coated with a getter material.
566, for an electrode which includes a vapor generating material or is coated with a vapor generating material.
627+, for thermionic cathodes which are formed or coated with a particular composition. 629, for resistance heated cathodes which include a particular composition.
630, for an electrode which includes alkali, alkaline or rare earth material.
634+, for an electrode having particular structure.
SEE OR SEARCH CLASS
252, Compositions,
500+, for electrically conductive or emissive compositions.
