US PATENT SUBCLASS 428 / 537.7
.~.~.~ Next to layer of metal salt (e.g., plasterboard, etc.)

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

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
532  DF  .~ Of carbohydrate {3}
537.5  DF  .~.~ Of paper {1}
537.7.~.~.~ Next to layer of metal salt (e.g., plasterboard, etc.)

DEFINITION

Classification: 428/537.7

Next to layer of metal salt (e.g., plasterboard, etc.):

(under subclass 537.5) Product, in which the paper is adjacent to a metal salt, such as calcium sulfate, etc.