(under subclass 1) Processes in which the material is sintered while in a provided environment which may be a liquid, solid, or a vacuum gas to produce a desired condition during the sintering operation.
(1) Note. Processes in which one of the material being treated decomposes or reacts to produce a material which becomes the desired environment are included in this and indented subclasses (e.g., a metal hydride, etc.).
(2) Note. See Class 148, Metal Treatment, appropriate subclasses, for metal heat treatment in general in special environments.
