US PATENT SUBCLASS 53 / 432
.~.~ Vacuum or gas treating
Current as of:
June, 1999
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53 /
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PACKAGE MAKING
396
DF
METHODS
{22}
428
DF
.~ With contents treating {7}
432
.~.~ Vacuum or gas treating {2}
433
DF
.~.~.~
> Receptacle forming
434
DF
.~.~.~
> Flexible preform cover (e.g., bags, pouches)
DEFINITION
Classification: 53/432
Vacuum or gas treating:
(under subclass 428) Methods including the step of subjecting the contents to the effects of a gaseous medium or a subatmospheric pressure or both.
(1) Note. The combination of contents handling or treatment plus the step of applying a vacuum or gaseous medium is found here.
(2) Note. See the search notes under subclass 403 for gassing or vacuumizing provided for elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
440, for methods wherein a gaseous atmosphere or vacuum is generated by subjecting the contents to a temperature modification.
510, for apparatus for treating contents with a vacuum or inert atmosphere.
