US PATENT SUBCLASS 428 / 573
.~ Width or thickness variation or marginal cuts repeating longitudinally

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

544  DF  ALL METAL OR WITH ADJACENT METALS {31}
573.~ Width or thickness variation or marginal cuts repeating longitudinally {2}
574  DF  .~.~> Variation in both width and thickness
575  DF  .~.~> Marginal slots (i.e., deeper than wide)

DEFINITION

Classification: 428/573

(under subclass 544) Subject matter wherein, an indeterminate number of times, at regular intervals, along the length of the material, the width or thickness varies or cuts are provided along a margin.

(1) Note. The mere provision of apertures or a roughened surface is not considered to be a variation in thickness.

(2) Note. A merely twisted structure is not considered to have a variation in width or thickness.

(3) Note. In general, claimed recitation of an individual lead frame, per se, with or without electrical leads/connections thereto will not be classified herein, but in Class 257. To be classified in Class 428, the stock material will have to be claimed either as an individual lead frame without being labeled "lead frame", or the lead frame structure will have to be a strip of interconnected lead frames prior to separation into individual lead frames. Claimed recitation of any electrical leads/connections (nominally or in detail) in addition to the lead frame, or of electrical components (nominally or in detail) in addition to the lead frame, per se, will result in the subject matter being classified elsewhere, e.g., Classes 174, 257 or 361.

SEE OR SEARCH THIS CLASS, SUBCLASS:

156+, for nonmetallic sheet or web material varying in thickness.

596, for metallic* stock-material* having one or more discrete through openings or cuts which may or may not be marginal. SEE OR SEARCH CLASS

30, Cutlery,

346.56, for a toothed or waved-edge razor blade, and 355 for other toothed blades.

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

314, for structure in which the exposed face gives the appearance of being formed of multiple units, this effect being gained by deformation or marking of the base material.

73, Measuring and Testing,

421, for articles of that class (73) which are samplers or tollers.

174, Electricity: Conductors and Insulators,

52.4, for lead frames combined with a housing for electrical components.

257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),

666+, for lead frames, per se, or combined with active solid-state electronic devices. 361, Electricity: Electrical Systems and Devices,

421, for lead frames with plural diverse electrical components.