.~ Filled with gas other than air; or under vacuum
DEFINITION
Classification: 428/69
(under subclass 68) Product which contains a nonliquid fluid which is (1) other than the usual atmosphere or (2) at less than normal atmospheric pressure.
(1) Note. Foamed or expanded materials produced by introduction or in situ production of gas other than air will be placed in this subclass only when there is a specific disclosure or claim that the gas remains in the final product and has a desired useful function therein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
310+, for a composite* web* or sheet in which at least one layer comprises foamed or expanded materials.
