(under subclass 58) Processes wherein free carbon or a free carbon containing coating is applied.
(1) Note. Carbon compounds such as carbides or organic compounds are not considered as carbon coatings for this subclass unless additional carbon in the elemental state is present.
SEE OR SEARCH THIS CLASS, SUBCLASS:
226+, for processes of forming a carbon coating by carbonizing.
249.1, for processes of forming a carbon coating by vapor deposition.
