.~ Gas or variation of gaseous condition in receiver {2}
8
.~.~ Vacuum
DEFINITION
Classification: 141/8
(under subclass 4) Processes in which gaseous material is removed from a receiver.
(1) Note. The product of this operation is a receiver more or less completely evacuated and with or without a refilling of gaseous material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
4, for filling with gas without evacuating steps.
65+, for evacuation apparatus, and see the search notes to subclass 65 for additional search field.
SEE OR SEARCH CLASS
53, Package Making,
405, for processes of gas evacuation and closing, and subclass 408 for gas evacuation followed by gas filling and closing.
313, Electric Lamp and Discharge Devices,
7, and 174+ for evacuating pumps and with getter gas or vapor generating means or pressure regulating means there classified.
445, Electric Lamp or Space Discharge Component or Device Manufacturing,
38+, 53+, 70, and 73 for methods of manufacture and apparatus for electric lamp devices including evacuation and degasification combined with other operations.
