Devices under Elements which include modifications of the engaging surfaces of clutches.
(1) Note. Where the clutch or element is claimed with no significant clutch or element structure, but merely in terms of the composition or material of which it is composed, it will be classified in the appropriate composition or material class, even though there is no claim to the composition, per se. In this connection, the following classes under Search Class, below, should be considered.
(2) Note. A patent directed to a product with a frictional property, where said property is enhanced by claimed structure (external structure (e.g., disc, zones of friction material; particular arrangement of strands, fibers or layers), will be placed in this Class (192) rather than in Class 428, Stock Material or Miscellaneous Articles, where the sole use disclosure is as a clutch or brake.
SEE OR SEARCH CLASS
75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,
231, for a composition having a continuous phase of free metal made by consolidating metal particles and containing a functionally defined nonmetal constituent, e.g., abrasive. (See (1) Note, above.)
106, Compositions: Coating or Plastic, note particularly the class definition of Class 106 for the classification of other compositions. (See (1) Note, above.)
106, Compositions: Coating or Plastic,
36, for tractive or friction surface compositions. 148, Metal Treatment, particularly
400+, for materials which are products of processes of treating metal classifiable in Class 148, or for products
distinguished only by the internal structure or characteristics of the metals, metallic compositions or alloys comprising such products. (See (1) Note, above.)
252, Compositions, for compositions not elsewhere classified. (See (1) Note, above.)
420, Alloys or Metallic Compositions, appropriate subclasses for articles defined only by their alloy or metallic composition. (See (1) Note, above.)
428, Stock Material or Miscellaneous Articles, appropriate subclasses, for a stock material product in the form of a single or plural layer web or sheet not elsewhere provided for and especially
64.1+, for a circular sheet, subclasses 196+ and 225+ for such a product embodying mechanically interengaged strands (e.g., weave, knit, etc.), and subclasses 364+ for a rod, strand, fiber or filament with structure (e.g., nonlinear, etc.), or coated. (See (1) Note, above and (2) Note, above.)
520, Synthetic Resins or Natural Rubbers, appropriate subclasses, particularly Class 523,
152, for a composition containing a synthetic resin or natural rubber having utility as a friction element for automobiles, trains, trailers, roller skates, skateboards, or other wheeled vehicles or to processes of preparing said composition. (See (1) Note, above.)
