US PATENT SUBCLASS 428 / 131
.~ Including aperture

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}
131.~ Including aperture {3}
132  DF  .~.~> Struck out portion type {1}
134  DF  .~.~> Noncircular aperture (e.g., slit, diamond, rectangular, etc.) {2}
137  DF  .~.~> Composite web or sheet {1}

DEFINITION

Classification: 428/131

(under subclass 98) Product wherein the web or sheet or a component thereof, has one or more discrete through openings with the peripheral wall or walls of each opening defined by either a line or closed loop passing through the thickness of the component while following a unidirectional or multidirectional rectilinar path.

(1) Note. Reticulation (a form of apertures), may be mechanically or chemically produced (e.g., spinning a polymer in a net-like or web-like form, etc.).

(2) Note. The periphery of said loop may vary in size while passing through the component or the loop may pass through the component edgewise to form a slit.

(3) Note. A product including a component with openings the walls of which are defined by loops following a nonrectilinear (e.g., tortuous or haphazard, etc.) path through the thickness dimension of the component will be placed in subclasses 304+.

(4) Note. A patent wherein the apertures are solely for the purpose of passing a stitching thread through the web will be found in Class 112, Sewing, subclasses 402+ and especially subclass 591.

(5) Note. Woven, knitted or netted products are excluded under this definition of aperture, unless it is the intent that apertures be specifically provided, other than the usual and normal openings between the strands due to the nature of the weave, knit or mesh. Generally a woven, knitted or netted product encompasses strands which lie above and below other strands in the same layer. Apertures must be deliberately made to meet the definition of this subclass. SEE OR SEARCH THIS CLASS, SUBCLASS:

17, for artificial turf having apertures in the base or substrate to permit draining.

43, for a web or sheet or layer which is perforated or apertured to permit separation of portions thereof at these weakened sections.

119, for a grill-like product comprising perpendicularly disposed components and intersecting strips*.

155, for a stock material with minute crevices extending thereinto, but not therethrough.

188, for stock material including a longitudinal or a transverse tubular cavity or cell*.

304+, for a product including a porous component.

596, for corresponding metallic* stock-material*.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

633+, for an "openwork" product for that class, and especially subclass 660 for a "lattice" type product (grating, foraminous reinforcement, grille) primarily of use as a rigid component of a building structure and structurally similar structures of more general application. See the search notes in subclass 660 for other classes providing for fabric or lattice openwork structures.

55, Gas Separation, 525, for an apertured product with specific structure to

facilitate gas separation.

160, Flexible or Portable Closure, Partition, or Panel,

385+, for stock material having an apertured edge disclosed for attachment to an elongated support.

181, Acoustics, appropriate subclasses for a web or sheet with either internal or external structure wherein said structure is disclosed to be provided for the purpose of deadening or amplifying sound, and especially

284+, where said structure is provided for the purpose of muffling or filtering sound.

277, Seal for a Joint or Juncture, for a packing element comprising a web or sheet having (a) a definite peripheral shape, (b) a modified service opening, or (c) a configuration or feature particularly adapting the element as a packing,

935+, for a seal made of a particular material.