US PATENT SUBCLASS 65 / 134.1
.~ Fining or homogenizing molten glass

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

17.1  DF  PROCESSES {32}
134.1.~ Fining or homogenizing molten glass {13}
134.2  DF  .~.~> Subatmospheric pressure or vacuum utilized
134.3  DF  .~.~> Melt accelerator or color modifier utilized (e.g., fining agent, etc.)
134.4  DF  .~.~> Oxygen enriched or nitrogen reduced gas utilized (i.e., modified air)
134.5  DF  .~.~> By injecting gas below surface of molten glass
134.6  DF  .~.~> Exhaust or top gas treated or recycled
134.7  DF  .~.~> Rotating furnace or chamber utilized (e.g., crucible, etc.)
134.8  DF  .~.~> By melting toxic or waste material
134.9  DF  .~.~> By eliminating gaseous inclusions (e.g., bubbles, etc.)
135.1  DF  .~.~> Glass conditioning channel section utilized
135.2  DF  .~.~> By agitating {1}
135.6  DF  .~.~> Electric furnace utilized (e.g., induction or radiant heat from electric source, etc.) {1}
135.9  DF  .~.~> By charging batch material {3}
136.4  DF  .~.~> By cooling molten glass

DEFINITION

Classification: 65/134.1

Fining or homogenizing molten glass:

(under subclass 17.1) Processes directed to (a) heating molten or batch glass to a high temperature to decrease its viscosity thereby permitting occluded, entrapped, or undissolved gases formed during the chemical reaction of the batch material to rise more readily and escape from the molten glass, (b) removing undissolved batch material, or (c) making a melt uniform in physical characteristics or in composition throughout.

SEE OR SEARCH THIS CLASS, SUBCLASS:

178+, for glass working apparatus combined with an agitator for molten or soft glass.

SEE OR SEARCH CLASS

588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the solidification or vitrification of waste for purposes of containment and for the treatment of slag to prevent the emission of hazardous or toxic gases.