US PATENT SUBCLASS 65 / 135.6
.~.~ Electric furnace utilized (e.g., induction or radiant heat from electric source, etc.)

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

17.1  DF  PROCESSES {32}
134.1  DF  .~ Fining or homogenizing molten glass {13}
135.6.~.~ Electric furnace utilized (e.g., induction or radiant heat from electric source, etc.) {1}
135.7  DF  .~.~.~> With submerged electrodes {1}

DEFINITION

Classification: 65/135.6

Electric furnace utilized (e.g., induction or radiant heat from electric source, etc.):

(under subclass 134.1) Processes wherein glass is melted or maintained in a molten condition (a) by passing an electric current between two electrodes, or (b) by using heat energy resulting directly from electrically induced radiation or induction.

(1) Note. Processes of using an electrical furnace which is not the primary heat source or using an electrical furnace in combination with other heating means are proper for this and indented subclasses.

SEE OR SEARCH CLASS

373, Industrial Electric Heating Furnaces,

27+, for apparatus and processes, respectively, directed to electric furnaces for melting glass batch material or heating molten glass. Patents claiming apparatus or a process for purifying or homogenizing molten glass in an electric furnace and defining in the claim specific electrical structure (e.g., electrodes) or specific electrical characteristics or the electrical energy (e.g., at least two different types of electrical energy or defining the magnitude) are classified in Class 373 otherwise the process is classified here in Class 65. The recitation of a glass "working," "treating," or "handling" operation by these words only is insufficient to exclude a patent from Class 373 unless a glass article is formed thereby (e.g., a filament), in which case classification is in Class 65.