(under subclass 17.1) Processes which include the step of closing an opening of a glass receptacle, which opening was used to exhaust a gas from the receptacle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
270, for glassworking apparatus with glass envelope tipping off means.
SEE OR SEARCH CLASS
53, Package Making, appropriate subclasses especially
403+, for sealing of receptacles combined with a filling step. See the reference to Class 53 in the class definitions of Class 65 for the lines between these classes and see the class definitions of Class 53 for related fields of search.
