US PATENT SUBCLASS 156 / 244.21
.~.~.~.~ Differential fluid pressure used

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

1  DF  METHODS {7}
60  DF  .~ Surface bonding and/or assembly therefor {93}
242  DF  .~.~ With lamina formation by molding or casting {4}
244.11  DF  .~.~.~ By extrusion {12}
244.21.~.~.~.~ Differential fluid pressure used

DEFINITION

Classification: 156/244.21

Differential fluid pressure used:

(under subclass 244.11) Processes including the application of positive or negative pressure to the work through the medium of a liquid or gas.

(1) Note. Use of steam pressure solely as a source of heat is not included in this subclass.