US PATENT SUBCLASS 156 / 45
.~.~ With subsequent treatment of plaster board

Current as of: June, 1999
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156 /   HD   ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE

1  DF  METHODS {7}
39  DF  .~ Plaster board making {6}
45.~.~ With subsequent treatment of plaster board {1}
46  DF  .~.~.~> Perforating

DEFINITION

Classification: 156/45

(under subclass 39) Processes in which the unitary body formed by the association of the facing sheets and core material is thereafter subjected to a chemical and/or mechanical modification.

(1) Note. Edge smoothing, cutting, manipulative drying techniques, coating, printing and manipulative pressure application are some examples of the type of modifications herein included.