US PATENT SUBCLASS 428 / 156
.~ Including variation in thickness

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

98  DF  STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION, ETC.) {20}
156.~ Including variation in thickness {7}
157  DF  .~.~> Differential nonuniformity at margin
158  DF  .~.~> Foamed or cellular component {1}
161  DF  .~.~> With component conforming to contour of nonplanar surface {4}
166  DF  .~.~> Interlaminar spaces
167  DF  .~.~> Parallel ribs and/or grooves {2}
170  DF  .~.~> And varying density {1}
172  DF  .~.~> Composite web or sheet {1}

DEFINITION

Classification: 428/156

(under subclass 98) Product wherein the distance between the nonthickness surfaces of a web or sheet or a component thereof, deviates from point to point along the transverse or longitudinal axis of the product.

(1) Note. As implied in the subclass definition, variation in total thickness (or bulge) caused by overlapping components, is excluded from the concept of this subclass. See search notes below to subclasses 88, 174+ and 189.

(2) Note. A patent directed to a component with minute surface irregularities in the form of very small pits or projections will be placed in subclasses 141+.

(3) Note. The presence of either a plain or countersunk through hole in a layer is not considered to provide a variation in thickness of an otherwise uniform thickness layer. See subclasses 131+.

(4) Note. Under the definition of this subclass, the sheet or web may be either single or plural layer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43, for a web or sheet which has a tear line or other weakened portion caused by a variation in thickness, to permit separation of the sheet or web through its thickness. 77+, especially 78+ for a composite web or sheet, one layer of which is smaller than the other and also one layer of which may vary in thickness.

88+, for a "sculptured" pile surface of varying height.

121+, for a web whose thickness varies by virtue of a fold at its edge.

139+, for a variation in thickness in the form of a projection which enters an aperture in a mating component.

174+, for a product comprising a folded component in which pleats are formed by the folds.

189, for a composite web or sheet whose total thickness varies due to the overlapping of laterally noncoextensive

components.

397+, for a rod or strand which varies in thickness.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

238+, for a floor mat including blade-like elements for cleaning purposes.

52, Static Structures (e.g., Buildings), 716.1+, for a rigid channel or trim member with a feature for attaching to an in situ erected type structure.

434, Education and Demonstration,

112+, for a reading device for the blind as an embossed product (i.e., Braille).