US PATENT SUBCLASS 52 / 177
SPECIFIED WEAR OR FRICTION-TYPE TRAFFIC-CARRYING SURFACE

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

177SPECIFIED WEAR OR FRICTION-TYPE TRAFFIC-CARRYING SURFACE {3}
179  DF  .~> Tread-nosing; e.g., shaped stair pad
180  DF  .~> Perforate structure having twisted element or particular surface
181  DF  .~> Exposed embedded element or inserted filler

DEFINITION

Classification: 52/177

(under the class definition) Structure including (1) a claimed exposed surface having a physical characteristic

specialized to increasing friction or reducing wear caused by pedestrian or other traffic or (2) a separate member covering the end of a stair tread which member conforms to the nosing, i.e., that portion of the tread beyond a riser, for the purpose of reducing wear or increasing friction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

182+, for (1) a stair construction wherein the member forming the permanent treads of the stairs may have a configuration defining a nosing which is integral with a stair component or (2) a stair covering combined with a stair construction or a tread covering having a defined feature other than for wear or friction reduction.

273, for an intersection having a flexible covering, e.g., carpeting.

327+, for a cast floor with additional coextensive section.

479+, for a facing held by a sustainer which may include plural layer flooring. 506.01+, for a facer attached to dissimilar sub-structure, e.g., linoleum or wood on a dissimilar sub-floor.

660+, for a fabric or lattice open-work not having a defined friction or wear surface feature.

716.1+, for in situ attached channel or trim strip.

782.1+, for a composite panel.

800.1+, for a composite panel with an attached edging.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

238+, for a foot scraping mat.

16, Miscellaneous Hardware,

4+, for a carpet fastener wherein a barrier or stair component is only nominally defined.

51, Abrasive Tool Making Process, Material, or Composition, for an abrasive material or composition even though nominally defined as a wear or antislip surface.

404, Road Structure, Process, or Apparatus, 19+, for a pavement with an antislip surface.

428, Stock Material or Miscellaneous Articles,

98+, for a single or plural layer stock material product

which is structurally defined, especially subclasses 141+ for a product having an irregular or nonuniform surface, subclasses 156+ for such a product in which at least one component varies in thickness, and subclasses 174+ for such a product in which at least one component is nonplanar.