(under subclass 57) Roll which is made of a particular metal alloy or metal base material.
(1) Note. This subclass is not intended to include intermetallic compounds or other metal compositions which are devoid of free metals such as oxides, sulfide, nitrides etc. Those patents may be found in subclasses 57 and 59.
(2) Note. A patent claiming a roll merely by the composition of which it is made; i.e., with the roll being mentioned by name only, is classified in the composition classes where a composition class provides for such composition even though there is no claim to the composition, per se.
SEE OR SEARCH CLASS
400, Typewriting Machines,
661+, for type impact-receiving platens composed of sound deadening materials, and subclass 662 for a platen having particular surface characteristic.
420, Alloys or Metallic Compositions, for similar metallic material.
