US PATENT SUBCLASS 428 / 212
.~ Including components having same physical characteristic in differing degree

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}
212.~ Including components having same physical characteristic in differing degree {3}
213  DF  .~.~> Thickness (relative or absolute) {2}
217  DF  .~.~> Hardness
218  DF  .~.~> Density or compression of components

DEFINITION

Classification: 428/212

(under subclass 98) Product wherein two components of a web, sheet or layer possess the same physical property but in different amount or intensity and are so claimed.

(1) Note. For purposes of this subclass porosity or cellularity is not considered to be a physical characteristic; a product having plural components which differ in this characteristic will be found in subclasses 304+ see search note below.

(2) Note. For purposes of this subclass, a component in which the physical characteristics of an element (e.g., fiber*, filament*, particle*, etc.) is defined and it is this characteristic which varies in another component, will not be included in this subclass, but will be found below, see subclasses 292.1+ and 323+.

(3) Note. For purposes of this subclass and its indents, if a composite sheet is claimed as having the same physical characteristic (e.g., thickness, etc.) this is considered to be a special case of "differing" degree and the patent will be classified in this group of subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

292.1+, for a composite web or sheet in which at least one component has structurally defined fibers which may be compared to the characteristics of the fibers in another component.

304+, for a web sheet layer of or containing components differing in degree of porosity. 323+, for a web, sheet layer of or containing components which differ in variations of structurally defined particles.

332+, for a composite web or sheet in which the thickness of only one component is specified.