US PATENT SUBCLASS 65 / 33.8
.~.~.~ Containing at least 3 percent lithium or lithium oxide (e.g., spodumene, eucryptite, petalite, etc.)

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

17.1  DF  PROCESSES {32}
33.1  DF  .~ Devitrifying glass or vitrifying crystalline glass (e.g., starting with or forming crystalline glass, etc.) {6}
33.7  DF  .~.~ Alumino-silicate containing phase {1}
33.8.~.~.~ Containing at least 3 percent lithium or lithium oxide (e.g., spodumene, eucryptite, petalite, etc.)

DEFINITION

Classification: 65/33.8

Containing at least 3 percent lithium or lithium oxide (e.g., spodumene, eucryptite, petalite, etc.):

(under subclass 33.7) Processes wherein the aluminum-silicon material also contains at least 3 percent lithium or lithium oxide.

(1) Note. Some of the most common lithium-alumino-silicate containing materials found in this subclass are: (a) spodumene (b) eucryptite; (c) petalite. This list is not intended to be exhaustive and is not limited to the above examples.