US PATENT SUBCLASS 428 / 617
.~.~.~ More than two components

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}
615  DF  .~ Composite; i.e., plural, adjacent, spatially distinct metal components (e.g., layers, joint, etc.) {15}
616  DF  .~.~ Deflectable by temperature change (e.g., thermostat element) {3}
617.~.~.~ More than two components

DEFINITION

Classification: 428/617

(under subclass 616) Subject matter in which the composite has three or more layers.

(1) Note. The third layer often is a buffering layer designed to prevent separation of the two main layers during flexure.

(2) Note. Patents placed in this subclass are not cross-referenced to subclass 916.

SEE OR SEARCH THIS CLASS, SUBCLASS:

591, for stock-material* composites having discrete means, more than merely a buffering component, to allow relative motion between components.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, 269, for contact material which constitutes three or more layers.