(under subclass 544) Subject matter wherein the stock-material* 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 material or component in a undirectional rectilinear path.
SEE OR SEARCH THIS CLASS, SUBCLASS:
66.6, and 131+, for corresponding nonmetallic* material, and the notes to subclass 131 for an explanation of the above definition.
546, 605 and 613, for porous stock-material*.
609, for metallic* stock-material* in which an aperture in one layer is filled with material integral with another layer.
SEE OR SEARCH CLASS
29, Metal Working, 6.1, for processes of manufacturing other multiperforate metal.
30, Cutlery,
346.61, for blades which are apertured or notched.
52, Static Structures (e.g., Buildings),
633, and 660+ for fabric or lattice articles, usually used in the construction trades, especially subclass 670 for expanded metal and subclass 673 for perforated metal.
72, Metal Deforming,
325, for methods of piercing by a compound tool.
83, Cutting, appropriate subclasses, especially
30, for puncturing methods.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
7+, for differential etching processes, and subclasses 510+
for surface bonding or assembling means with cutting, punching, piercing, or tearing means. 204, Chemistry: Electrical and Wave Energy,
283, and 284 for perforated or foraminous electrodes.
205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,
75, for electroforming of perforated or foraminous articles.
219, Electrical Heating,
384, for arc-type devices with perforating means.
245, Wire Fabrics and Structure,
2+, for analogous stock-materials* made by bending wires.
429, Chemistry: Electrical Current Producing Apparatus, Product, and Process,
241+, for an open mesh or perforated plate battery grid.
