(under subclass 39) Subject matter comprising a step of, or means for, the application to work material of a substance which is claimed or disclosed as an agent for reducing friction or tool wear (i.e., a lubricant).
(1) Note. For placement in this subclass, a patent must be
directed to lubrication of work material; this may be accomplished by applying lubricant to a tool before or during its engagement with work. Lubrication of machine parts generally is excluded from this subclass.
(2) Note. In the absence of more definitive terms, the reference to "oil", or to the reduction of friction or wear, is regarded as defining a lubricant for this subclass. The application of water or an aqueous solution, with no reference to lubrication, is proper subject matter for subclass 39 above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
38, for exposure of work to gas, vapor, mist, or modified atmosphere.
46+, for coating of work (possible value as a lubricant).
69, for lubrication of tool or machine in rotating- or gyrating-tool machine. 236, for lubrication of a roller or roller-like tool-element or the associated machine.
463, for a tool having passageway usable for lubrication.
SEE OR SEARCH CLASS
425, Plastic Article or Earthenware Shaping or Treating: Apparatus,
90+, for apparatus to shape or reshape non-metals combined with a means to apply a coating (e.g., parting, etc.) material to the work or work contact means.
