US PATENT SUBCLASS 65 / 32.1
.~ Operating under inert or reducing conditions

Current as of: June, 1999
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65 /   HD   GLASS MANUFACTURING

17.1  DF  PROCESSES {32}
32.1.~ Operating under inert or reducing conditions {4}
32.2  DF  .~.~> With bonding or sealing
32.3  DF  .~.~> With crystallization or photochromism or phase separation
32.4  DF  .~.~> With coating
32.5  DF  .~.~> With forming glass from molten state, with treatment of molten glass, or with drawing of glass in softened state

DEFINITION

Classification: 65/32.1

Operating under inert or reducing conditions:

(under subclass 17.1) Processes including an operation carried under controlled conditions which provide an inert or reducing area therefore to prevent oxidation or to cause chemical reduction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157, for glass working treating means including means providing special gaseous atmosphere.

SEE OR SEARCH CLASS

148, Metal Treatment, particularly

240+, for processes of reactive coating of metal as defined thereunder. The combination of reactive coating of metal with a glass working or treating operation is proper for Class 65. However, the combination of a significant heat treatment to modify or maintain the internal physical property (i.e., microstructure) or chemical property of the metal with a glass working or glass treating operation is proper in Class 148.